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4 cards from this section. Quick, good the night before a test.
Define a vertical angle.
Think about how angles are measured above or below a flat surface.
What is the purpose of the altitude bubble on a theodolite?
How do we check if something is straight?
What is a vertical angle?
Consider what vertical angles represent.
True or False: The altitude bubble should be off-center for accurate vertical angle measurements.
What happens to measurements if the bubble is not centered?
A surveyor measures a vertical angle of elevation to the top of a building which reads 45° on the left face and 47° on the right face after averaging. What is the true vertical angle of elevation?
Remember to use the average of both readings!
During a project, a surveying team records a vertical angle of depression to a lake as 30° and then rechecks from the opposite side to find 32°. What is the average depression angle?
Use the same averaging method as before.
6 more questions in this section. Enroll free to practise them all.
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