Grant Thompson
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#1
Report Thread starter 3 years ago
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I just wanted I know why these angles are the same. I'm probably missing something obvious but it would be great if someone could point it out.


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GlockInmyRari
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#2
Report 3 years ago
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Assuming that the two angles under 5a/4 are 90°:
(Is that given in the assignment?? if line AB is horizontal they must be 90° as gravity pulls in the perpendicular direction)

theta(A) = 180° - 90° - B
angle opposite of theta(P) = 180° - 90° - B
angle opposite of theta(P) = theta(P)
therefore:
angle opposite of theta = theta(A)
theta(A) = theta(P)
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