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How do you find the value of variables in a circle? Number 9?
a is half of the arc angle 108 so a = 54. b is half of the arc angle 60 so b = 30. c is identical to the angle that's missing from the triangle with a and b in it. so, a + b + c = 180 54+60+c = 180 c = 180-54-60 = 66
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