2021-12-19

Two circles in a semicircle separated by a perpendicular line

This question was uploaded on 19/12/21 on social media accounts.

Solution:

a = 2y, b = 2x
Click here for proof of this identity (I proved it in one of my previous questions)
Due to angle inscribed in a semicircle, a+b = 90°
⇒ 2x+2y = 90°
⇒ x+y = 45°
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