Question

In the given figure, find a+b.​

Answer 1

Answer:

So 180-(a+b) = x+9 [vertically opp. angles]

Also Sum of all angles in Semicircle = 180.

So x/2 + 5x/2 - 5 + x + 9 = 180

x = 44°

So 180-(a+b) = x+9 = 44+9 = 53°

(a+b) = 180-53 = 127°

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