A theorem in geometry states that the measure of an inscribed angle is half the measure of its intercepted arc. In the fiaure. angle C intercepts arc AB and overline AB is the diameter of the circle. Which equation is a step in showing that mangle C=90 ? b/a-c b/a+c =-1 b/c-a b/c+a =-1 b/a-c b/a+c =1 = b/c =-1
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