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Question
In traversing by included angle method, which of the following is correct?
i. If the direction of progress is counter clockwise, the included angles measured clockwise are interior angles.
ii. If the direction of progress is clockwise, the included angles measured clockwise are interior angles.
iii. If the direction of progress is counter clockwise, the included angles measured clockwise are exterior angles.
iv. If the direction of progress is clockwise, the included angles measured clockwise are exterior angles.
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A.
i and iv
B.
iii and iv
C.
ii and iii
D.
i and ii
Answer ( Option A)

i and iv

Solution

Traversing by included Angle Method
• An included angle at a station is either of the two angles formed by two survey lines meeting there and these angles should be measure clockwise.
• The method consists simply in measuring each angle directly from a backsight on the preceding station.
• The angles measured from the back station may be interior or exterior depending on the direction of progress.
• The direction of progress is counter-clockwise and so the angles measured clockwise are the interior angle.
• The direction of progress in clockwise and so the angles measured clockwise are the exterior angle.

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