angle, spheroidalAn angle between two curves on an ellipsoid, measured by the angle between their tangents at the point of intersection. If a line has an azimuth of 150, its back azimuth would be 330. Vertical angles are usually needed to move over vertical obstacle and for The most common way to measure angles is in degrees, with a full circle measuring 360 degrees. Angles measured from an extension of the back line Mostly used in pipeline or route surveys Measured to the right (clockwise) or to the left (counterclockwise) If a closed loop, deflection angles will add up to 360 Example of Deflection Angles Example of Deflection Angle RT View Previous View Next Basic rules for lapping in column reinforcement. Vertical angle is taken either from zenith (position at 0) or Interior angles are the angles lying inside a closed traverse. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. 4 A marker placed to indicate a point at which there is a change in the direction of a surveyed line. at least several years until lightweight, The Second Great Theodolite, was invented by angle, sphericalAn angle between great circles on a sphere. See also angle, acute. When you build a house, you will keep aside some space for the parking of the car. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. 4. The angles of the traverse should be measured clockwise from the backward direction to the forward direction. Interior angle = F.B. angle, central1 The angle at the center of radius of a circular arc included between the radii which pass through beginning (P.C.) Usually more angles are taken from one setup. With the adjusted latitudes and departures, you can now adjust the original bearings and distances by the method called inversing. difference between F.B. 10. 2 For alignment and/or boundary descriptions, the interior angle is 180 degrees minus the central angle, if the angle is equal to or less than 180 degrees; otherwise, it is the central angle minus 180 degrees. The first angle is taken from BS to FS and written into field book. angle to entered directions, enter a non-zero value for "Rot". See also angle, direct. a map of a surveyed area or to establish BP. In particular, it is helpful to know how to calculate the sum of interior angles in a polygon. The sum of the interior angles of squares is 360 because the formula is 180 (n - 2), where n is the number of sides. The angles in a quadrilateral (a 4-sided polygon) total 360 degrees. Horizontal angles Angle can be measured clockwise (angle to the right) or counterclockwise (angle to the left). By signing up you are agreeing to receive emails according to our privacy policy. Here, back bearing is not given, so we have to calculate the back bearing with the help of fore bearings. All about civil construction knowledge- PARAM VISIONS. azimuth is taken in a backward direction and is azimuth of, The Great 3 foot Theodolite from 1785 by Ramsden, Classic mechanical theodolite from 1910 by Ertel, Vernier: a scale used to improve the precision of reading, Setting up tripod (from Leica T105/T110 user manual. Before uploading and sharing your knowledge on this site, please read the following pages: 1. % of people told us that this article helped them. The accumulated angle size is divided by 6 to Bearing of BA = 164 15 + 180 = 344 15. 2. If the polygon is regularthat is, if all the sides are the same lengththen all you have to do is divide the total number of degrees of all the interior angles by the number of sides in the polygon. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. To calculate azimuths counter-clockwise around a traverse: Add the interior angle to the back azimuth of the preceding line. = [174 + 9445' + 6845' + 9145' + 11045']. zenith is perpendicular to the horizon. Found inside - Page 283In any closed figure, the sum of the interior angles is given by the equation: (A.8) Sum of Angles = (n 2) 180 where n is equal to the number of angles. angle, deflectionA horizontal angle measured from the prolongation of the preceding line, right or left, to the following line. The deflection angle vary from 00 to 180 but never more than 180.The deflection angle measured clockwise direction from a prolonged survey line is known as the right deflection angle. Since it is more than a complete circle, deduct 360. As noted above, a right angle measures 90 degrees. For example, a triangle always has 3 angles, while a square or rectangle always has 4, and so on. Tip: Some polygons offer cheats to help you figure out the measure of the unknown angle. . Angles are given names according to how many degrees they measure. If the result is greater than 360, subtract 360. Quadrantal azimuths are properly called bearings; half circle azimuths are used in astronomy. To find out how to calculate angle measure in a right triangle, read on! It served Simply follow a simple rule if going clockwise about the traverse: Subtract the interior angle from the back azimuth of the previous course, and the calculations can be performed quickly and easily. trigonometric leveling (explained in other chapter). For example, if you want to know the sum of the interior angles of a hexagon, you would count 6 sides. Last Updated: October 3, 2022 However, as stated earlier, azimuths are much easier to calculate. A pentagon has 5 sides, and can be made from three triangles, so you know what its interior angles add up to 3 180 = 540, And when it is regular (all angles the same), then each angle is 540 / 5 = 108, (Exercise: make sure each triangle here adds up to 180, and check that the pentagon's interior angles add up to 540), The Interior Angles of a Pentagon add up to 540. For example, in a hexagon, there can be four triangles that can be formed. Azimuths are computed This article has been viewed 649,914 times. 23 February 2021. a.Interior Angles For a closed non-crossing loop traverse, the angle condition is: b. Deflection Angles If deflection angles are used, the angle condition depends on how many times, if any, the traverse crosses itself. You can learn anything you want if you're willing to put in the time and effort. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. In this case, we are going to calculate clockwise from A to B to C. List the adjusted interior angle draw a sketch of the entire traverse. Find the angle between the lines OA and OB if their respective bearings are: Since the lines are meeting at the same point O, the included angle will be the difference of the two bearings. To learn how to calculate the sum of interior angles by drawing triangles, read on! Theodolite is a telescope mounted on horizontal and vertical The difference will give the interior angle if it is less than 180. Telescope is pointed back to BS (with locked motion of value). To compute interior angle at D, subtract the sum of the other interior angles from (n-2)x180. Write actual zero into field book (might be not Unlock expert answers by supporting wikiHow, https://www.mathsisfun.com/geometry/interior-angles-polygons.html, https://www.bbc.co.uk/bitesize/guides/zshb97h/revision/6, https://www.mathopenref.com/polygoninteriorangles.html, https://www.mathsisfun.com/algebra/trig-finding-angle-right-triangle.html, https://sciencing.com/angle-right-triangle-8159743.html, (Calculate Angles). Share your Surveyor Math Formulas and Computational Tricks Here Interior Angle Computations Parkland College Todd Horton, PE, PLS For example, if you are working with a hexagon. - B.B. Definition- A deflection angle is an angle which a survey line makes with the prolongation of the proceeding line. Plan and prepare. and B.B of all lines is exactly 180, we can find the angles and bearings in a shorter way as follows: Let a be the interior angle required at a station, P be the F.B. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. The following rules may be employed to find the angles between the lines whose bearings are given. Additionally, David has worked as an instructor for online videos for textbook companies such as Larson Texts, Big Ideas Learning, and Big Ideas Math. By visiting this website, certain cookies have already been set, which you may delete and block. The remote interior angles of a triangles are the two angles that are not adjacent to the exterior angle.The remote interior angles do not share the vertex of Clear up math equations If you're struggling to clear up a math equation, try breaking it down into smaller, more manageable pieces. 90 + 90 + 90 + 90 = 360, Now tilt a line by 10: On Demand Content Guidelines 2. being taken from zenith or horizon, both method are usually supported Calculate the interior angles of a closed traverse. (1) Putting the formula for sum of all interior angles in (1) we get, Sum of exterior angles = n x 180 - (n-2) x 180. How to calculate the area of irregular shaped land or plot?/ Irregular shape site area calculation. 4. [ (2 5 - 4) 90] = [6 90] = 540 Thank you for going through these calculation steps . angle, measuredAn angle measured using an instrument without any application of corrections for local conditions. When theodolite is setup, point to backsight (BS). In such an area, the method of traversing is adopted. If a back bearing is < 180, add 180 to the bearing. (c) If the lines are not in the same side of the meridian but they are in the adjacent quadrants (Fig. telescope is rotated against trunnion axis and pointed to FS. Direction calculations can be performed in either a clockwise or counter-clockwise manner about a traverse. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a3\/Calculate-Angles-Step-9.jpg\/v4-460px-Calculate-Angles-Step-9.jpg","bigUrl":"\/images\/thumb\/a\/a3\/Calculate-Angles-Step-9.jpg\/aid5444445-v4-728px-Calculate-Angles-Step-9.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
\u00a9 2023 wikiHow, Inc. All rights reserved. Traversing and triangulation (measuring angles of triangles) are further discussed in this chapter. of EA = 9015' - 124045' = 115030' E = 115030' Check: The sum of the interior angles of a polygon must be equal to (2n - 4) right angles, where n is the number of sides of the polygon. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. The value 180 comes from how many degrees are in a triangle. Measurement back to BS is made again then and the result is This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. 0000117145 00000 n 0000002902 00000 n If the exterior angles are given, then the total sum of the exterior angles = (2n + 4) * 90 Remember, an exterior angle = 360 - interior angle. For instance, you can use a sine, cosine, or tan function to find the angles in a right triangle depending on which angle youre calculating and which side lengths you know. They have no relation to earth coordinates. Include your email address to get a message when this question is answered. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Representing the direction of a line with bearings is a long-standing tradition that continues today on plats, legal descriptions, site plans, and other documents. Calculate the included angles. How do you expect the Infrastructure Investment and Jobs Act to impact your firms backlog in the next 2-3 years? What is brass in civil construction? If not, repeat steps above. By using our site, you agree to our. Yet, with the right program management information system as your foundation, you can exchange data with ERP systems in real time. Terms of Service 7. (d) If the lines are not on the same side of the meridian and also not in the adjacent quadrants (Fig 5.7. d) the included angle = 180 difference of the bearings OA and OB. On the picture above is a mechanical double circle theodolite from 1910. All Rights Reserved BNP Media. figure out value of angle. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. "This has really helped me in remembering what the teacher taught. angle, directAn angle measured directly between two lines, as distinguished in transit traverse from a deflection angle. This article was originally posted on www.pobonline.com. attention to precise setup the instrument over station as well. Horizontal control network may be established by one of the following methods: traversing, triangulation, trilateration, GPS, photogrammetry. Zero the instrument. Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. exterior angle is measured outside close polygon. The exterior angle is supplementary to the interior angle, so to find the exterior angle, we simply subtract the interior angle from 180: 180 - interior angle. So, 180 (4 - 2) = 180 x 2 = 360. measurements. Brass is a non-standard unit that is still prevalent in India with a history of 200 years or so. However, some surveyors have realized that calculating the direction of a line is much easier when using azimuths and then converting the azimuths to bearings for representation on documents. For information, visit www.creativeconstruction.com or www.pobonline.com (click on POB Store). For instance, a triangle has 3 sides and 3 interior angles while a square has 4 sides and 4 interior angles. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4b\/Calculate-the-Sum-of-Interior-Angles-Step-8-Version-4.jpg\/v4-460px-Calculate-the-Sum-of-Interior-Angles-Step-8-Version-4.jpg","bigUrl":"\/images\/thumb\/4\/4b\/Calculate-the-Sum-of-Interior-Angles-Step-8-Version-4.jpg\/aid1633341-v4-728px-Calculate-the-Sum-of-Interior-Angles-Step-8-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
\u00a9 2023 wikiHow, Inc. All rights reserved. Divide that sum by 180, then add 2. If two equilateral triangles are placed together to form a rhombus, how do I calculate the value of each interior angle of this rhombus, and how do I find the sum? Minimum space required for car parking in a residential building. Back When the two lines meet at a point, two angles (interior and exterior) and formed. 1. Bearing of a line is the angle measured from either the north or south end of a reference meridian. (b)]: The signs (+) or (-) in the above equations are to be used according as (P F) or (F P) is less or more than 180. Please do not enter any spam link in the comment box. First, take a set of overall dimensions, recording key spans of the room such as the length of corridors, walls, and . Terms of Service, 2023Land Surveyors United - Global Surveying Community Step 2: Now click the button "Submit" to get the angle. "I was in a test and I forgot the formula, so this actually helped, lol. The angles can be determined by observing the bearings of the two lines from their point of convergence. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). . Copyright 2023. See also lens, narrow-angle; lens, normal-angle; wide-angle lens. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\n<\/p>
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f4\/Calculate-the-Sum-of-Interior-Angles-Step-4-Version-5.jpg\/v4-460px-Calculate-the-Sum-of-Interior-Angles-Step-4-Version-5.jpg","bigUrl":"\/images\/thumb\/f\/f4\/Calculate-the-Sum-of-Interior-Angles-Step-4-Version-5.jpg\/aid1633341-v4-728px-Calculate-the-Sum-of-Interior-Angles-Step-4-Version-5.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
\u00a9 2023 wikiHow, Inc. All rights reserved. Again the process is one of simple triangle solution. of sides. Bearing is represented by the letter N or S preceding the angle. Following are the 4 points or rules to be known before computing the interior angles. . The word brass is used as a measurement un Now, let us go through 7 basic rules while lapping the rebars in columns. not. Step 1: Enter the number of sides of the polygon in the given input box. For example, you might want to find the sum of the interior angles of a hexagon, so you would draw a six-sided shape. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. After attaining a perfect 800 math score and a 690 English score on the SAT, David was awarded the Dickinson Scholarship from the University of Miami, where he graduated with a Bachelors degree in Business Administration. Repeat the calculation for each line of the traverse. angle of currentThe angular difference between 90 and the angle made by the current with a measuring section. Work out what all the interior adds up to, then divide by however many sides the shape has. An angle measuring more than 90 but less than 180 degrees is an obtuse angle. For example, if the interior angle was 165, subtracting it from 180 would yield 15. 90 + 60 + 30 = 180, Now tilt a line by 10: I have a big math test tomorrow, and I. So we can use this pattern to find the sum of interior angle degrees for even 1,000 sided polygons. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. The angles taken in the field have context within the network of points being For the calculation procedure, go through the following steps. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Plagiarism Prevention 5. Top Young Professionals Conference seeks to inspire early-stage construction industry professionals and provide effective workplace enhancement and career development strategies. 2 A marker at a point on a traverse, to indicate a change in direction of the traverse at that point. In the whole circle bearing system, the angle cannot be -ve. Compass Surveying Chain surveying can be used when the area to be surveyed is comparatively small and is fairly flat. Bearings are measured either clockwise or counterclockwise from North and South. The sum of these two angles is equal to 360. Did you know you can get expert answers for this article? This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Start by writing down the starting azimuth. Angle 2 = 450 - Angle 1 modulus 360 Either interior or deflection angles can be used for a closed traverse -- we will use interior . If a back bearing is < 180, add 180 to the bearing. Subtract the interior angle to obtain the azimuth of the next line. AOB =180- sum of the reduced bearings of OA and OB. A polygon has the same number of interior angles as sides. Mario holds a BA in Mathematics from California State University, Fresno, and a Ph.D. in Applied Mathematics from the University of California, Merced. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/ad\/Calculate-Angles-Step-1-Version-4.jpg\/v4-460px-Calculate-Angles-Step-1-Version-4.jpg","bigUrl":"\/images\/thumb\/a\/ad\/Calculate-Angles-Step-1-Version-4.jpg\/aid5444445-v4-728px-Calculate-Angles-Step-1-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":" \u00a9 2023 wikiHow, Inc. All rights reserved. For example, if you know that 4 of the angles in a pentagon measure 80, 100, 120, and 140 degrees, add the numbers together to get a sum of 440. Expert Interview. 5.7, a) the included angle = the difference of the two reduced bearings. Online Interior Angles Of Polygon Calculator Step 1: Enter the number of sides of the polygon in the given input box. Here, back bearing is not given, so we have to calculate the back bearing with the help of fore bearings. The target (measured) point must be clearly marked for Included angle = [back bearing of previous line - fore bearing of next line.]. If it was a hexagon, then n = 6 and sum of interior angles would be = (2*6 - 4)* 90 = 720 degrees Apply this check to the closed traverse at hand and see the error. Dedicated to the Memory of Skip Farrow (1954-2015), E-mail me when people leave their comments , Representing Land Surveyors in 190 Countries, We have members in every region of the planet. Visit our updated, Azimuth of AB = Add 180 to get Back Azimuth ------------------------ Back Azimuth = Subtract Interior Angle ---------------------- The Azimuth of BC is 35000' +18000' --------- 53000' -6421' ------- 10539', Azimuth of BC = Add 180 to get Back Azimuth = --------------------- Back Azimuth = Subtract Interior Angle --------------------- The Azimuth of CD is 10539' +18000' --------- 28539' -20635' --------- 7904', Azimuth of CD = Add 18000'to get Back Azimuth ------------------ Back Azimuth = Subtract Interior Angle ---------------------- The Azimuth of DE is 7904' +18000' -------- 25904' -6453' --------- 19411', Azimuth of DE = Add 18000'to get Back Azimuth ------------------ Back Azimuth = Subtract Interior Angle ---------------------- The Azimuth of EA is 19411' +18000' -------- 37411' -9638' -------- 27733', Azimuth of EA = Add 18000'to get Back Azimuth ------------------ Back Azimuth = Subtract Interior Angle ---------------------- The Azimuth of AB is 27733' +18000' -------- 45733' -10733' -------- 35000'. clockwise from geographic north. 80 + 70 + 30 = 180, It still works! = [4945' + 11730' + 26545' + 430' + 10230']. equivalent to 2.5 mm (that is 1:40,000). By visiting this website, certain cookies have already been set, which you may delete and block. If you know all the angles in the polygon but one, you can add the known angles up and subtract the sum from the total number of degrees of all the interior angles. Simple inspection of the rhombus and the two triangles would show what the angles are, given that equilateral triangles have three 60 angles. To calculate the sum of interior angles, start by counting the number of sides in your polygon. Label this vertex A. Error = Sum of the given (actual) interior angles - Theoretical Sum = nearly 1 m in diameter, and its weight was 90 kg. telescope length is 29 cm. Also, the triangles that make up the quadrilateral should all obey the laws of sines and cosines - any deviation is a measure of error. have to use plumb-bob with visible line to allow clear reading. Bearing of a Line and Its Designation | Compass Surveying | Surveying, Local Attraction (With Remedies) | Compass Surveying | Surveying, Magnetic Declination: Meaning and Variation | Compass Surveying |Surveying, 5 Main Methods of Plotting a Traverse Survey | Compass Surveying |Surveying, Unconventional Machining Processes: AJM, EBM, LBM & PAM | Manufacturing, Material Properties: Alloying, Heat Treatment, Mechanical Working and Recrystallization, Design of Gating System | Casting | Manufacturing Science, Forming Process: Forming Operations of Materials | Manufacturing Science, Generative Manufacturing Process and its Types | Manufacturing Science. angle, dihedralThe angle formed by two intersecting planes. Meridian depicted on horizontal measurement. and P.T. Thank you for going through these calculation steps. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. angle, rightThe angle bounded by two radii that intercept a quarter of a circle. Then obtain the interior angle by subtracting the difference from 360. again and adjust the theodolite foot screws for alignment with the reference Azimuths may be referenced to true North, to magnetic North, to an azimuth taken from plans, or from an assumed direction. 0.1 minutes (i.e. The amazing elegance comes as this equation works by converting angles in either direction - with no modification! References. Then. If any lines AB,41, AC, 115 Angle BAC= Bearing of AC-Bearing of AB=115-41=74. In this video we will learn how to find an Interior Angles for Traverse, and we will learn how to find Azimuth too. How to calculate included angles of a clockwise closed traverse?/ Calculating interior angles of a traverse in compass surveying. angle of convergenceSee parallax. That applies especially for theodolite (but applies At each vertex of a polygon, there is both an interior and exterior angle, corresponding to the angles on the inside and outside of the closed figure. Definitions of Surveying and Related Terms. Surveying Formulas calculators give you a list of online Surveying Formulas calculators. If a back bearing is 180, deduct 180 from the bearing. For those who arent using azimuths, I hope this article helps in understanding why many people now use azimuths. Measurement to FS is made again then, angle is accumulated. 3 A point, in a survey, at which the alignment or boundary changes direction from its previous course. As fore bearing of AB < 180, we have to add 180 to the FB. ", "The formula is super helpful, thank you.". If we add up all of our exterior . This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. See also angle, direct. [ (2 5 - 4) 90] = [6 90] = 540 Go through the article . angle, theta1 In Lamberts Conformal Conic Projection, the angle of convergence, on the developed surface of the cone, between the central meridian and the meridian through the point. To understandA to Zof surveying,click here. angle, concludedAn interior angle between adjacent sides of a closed figure obtained by subtracting the sum of all the other interior angles of the figure from the theoretical value of the sum of all interior angles. Surveyors express angles in several ways. The polygon has 8 sides. Calculation Of Bearings From Interior Angles | Compass Surveying | Civil Engineering | Civil Inside 17.5K subscribers Subscribe 4.9K views 2 years ago Surveying Easy Tips & Tricks To. theodolite is 5" and target is at a distance of 100 m. Then 5" at 100 m is Thanks to all authors for creating a page that has been read 374,302 times. The total value of the angle should be equal to [(2n -4) 90], where n= no. Welcome to the exterior angles of a triangle calculator, a simple and convenient tool that will help you calculate a triangle's exterior Average satisfaction rating 4.8/5 Based on the average satisfaction rating of 4.8/5, it can be said that the customers are highly satisfied with the product. Look through the optical plummet We have already learned that the sum of the interior angles in a triangle . ( part-1 ). of the line coming from the previous station and F be the F.B. The First Great Theodolite was wikiHow is where trusted research and expert knowledge come together. practice to measure unused angle too and make, Measuring horizontal angle: horizon closure. This image may not be used by other entities without the express written consent of wikiHow, Inc. \u00a9 2023 wikiHow, Inc. All rights reserved. If the sum is close to 360, error can be divided by count of angles to Interior angle is measured inside closed polygon. In this example, 1080 / 180 = 6. Example (precision): let assume precision of Share: Right Triangle Calculator The triangle calculator solves and draws any triangle from any three parameters like sides, angles, area, heights, perimeter, medians, inradius, etc. Solve Now. angle of coverageThe apex angle of the cone of rays passing through the front nodal point of a lens; angle of filed. evaluate horizontal readings for leveling but usually with lower accuracy than "South . As fore bearing of AB <180, we have to add 180 to the FB, As fore bearing of BC <180, we have to add 180 to the FB, As fore bearing of CD <180, we have to add 180 to the FB, As fore bearing of DE >180, we have to deduct 180 from the FB. (ii) Given the Bearings of the Lines in the Quadrantal System: In this case, to avoid unnecessary labour, firstly draw a rough sketch showing the directions of the lines and then proceed as follows. Proceed clockwise about this traverse. This image may not be used by other entities without the express written consent of wikiHow, Inc. \u00a9 2023 wikiHow, Inc. All rights reserved.
\n<\/p>
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/25\/Calculate-the-Sum-of-Interior-Angles-Step-5-Version-4.jpg\/v4-460px-Calculate-the-Sum-of-Interior-Angles-Step-5-Version-4.jpg","bigUrl":"\/images\/thumb\/2\/25\/Calculate-the-Sum-of-Interior-Angles-Step-5-Version-4.jpg\/aid1633341-v4-728px-Calculate-the-Sum-of-Interior-Angles-Step-5-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
\n<\/p>
\n<\/p><\/div>"}, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/02\/Calculate-Angles-Step-2-Version-4.jpg\/v4-460px-Calculate-Angles-Step-2-Version-4.jpg","bigUrl":"\/images\/thumb\/0\/02\/Calculate-Angles-Step-2-Version-4.jpg\/aid5444445-v4-728px-Calculate-Angles-Step-2-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"