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Find angles a, b, c, d.  Help, I'm really confused.

 

 Aug 14, 2020
 #1
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Hint:  If one side of an inscribed triangle passes through the center of a circle, the other two sides are the legs of the right-angled triangle.

 Aug 14, 2020
 #2
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It's clear that angle A is 90 and so is angle B. So, angle D is 20, and angle C is 50.

 

Hope this helped!

 

laugh

 Aug 14, 2020

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