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posted by  EDMONAB on 9/12/2008 12:32:40 AM  |  status: Live  

SURVEYING - Traversing

Course Textbook Chapter Problem
Surveying Elementary Surveying: An Introduction to Geomatics 12/E, Charles D. Ghilani and Paul R. Wolf 9 11
Question Details:
Seven interior angles of an eight-sided polygon traverse were observed as:
     A = 158°15'44", B = 135°25'24", C = 136°04'56", D = 121°56'13",
     E = 138°48'37", F = 198°08'20", and G = 81°20'26".
Compute the angle at H, which was not observed.

 
- EDMONAB
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posted by jayborre on 9/12/2008 10:23:26 AM  |  status: Live
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Response Details:
Assuming that this will be the configuration of the traverse:



from geometry, to determine the sum of interior angles of a n-sided polygon is given by the formula:



Since the traverse is an octagon (8-sided polygon), the sum of its interior angles will be:


If you will try to add all the interior angles given from A -G, it will yield,

Σθint A-G =995o 27' 56''


To get the interior angle of H:

θH = 1080 - 995o 27' 56'' = 84o 32' 4''



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JAY ROBIN B. BORRE
BS Civil Engineering
Technological Institute of the Philippines - Manila
jayborre@yahoo.com
0917-9137085
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