# Why Are These Angles The Same?

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#1

https://ibb.co/iOjOk8

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.

&lt;a href=&quot;https://ibb.co/iOjOk8&quot;&gt;&lt;img src=&quot;https://image.ibb.co/kZvkyT/IMG_1220.jpg&quot; alt=&quot;IMG_1220&quot; border=&quot;0&quot;&gt;&lt;/a&gt;
0
3 years ago
#2
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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