Brian McCall

Univ. of Wisconsin
J.D. Univ. of Wisconsin Law school

Brian was a geometry teacher through the Teach for America program and started the geometry program at his school

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Inscribed Angles - Problem 3

Brian McCall
Brian McCall

Univ. of Wisconsin
J.D. Univ. of Wisconsin Law school

Brian was a geometry teacher through the Teach for America program and started the geometry program at his school

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Recall that the measure of the intercepted arc of an inscribed angle is twice the measure of that inscribed angle. Also recall that the sum of all angles in a circle is 360°. So, in order to find a missing arc measure, subtract the known arc measures from 360°. Then, it is possible to find any inscribed angle, since all of their intercepted arcs are known. When inscribed angles intercept the same arc, their measures are congruent.

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