Question

Based on this figure which statement proves that the opposite angles of an inscribed quadrilateral are supplementary?

Angle KCM is 2a, reflex angle KCM is 2b, and 2a + 2b = 360°.
Angle KLM is a, angle KJM is b, and a + b + angle JKL + angle LMJ = 360°.
a is half of reflex angle KCM, b is half of angle KCM, and the sum of angles around the center C is 360°.
a is half of angle KCM, b is half of reflex angle KCM, and the sum of angles around the center C is 360°.

Answer 1

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Answer 2

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