In a cyclic quadrilateral ABCD prove that each exterior angle is equal to the opposite interior angle. Post a comment or solution.
More Geometry Problems:
Proposed Problem 72: Intersecting Circles. Cyclic quadrilateral, Chords, Parallel.
Proposed Problem 70: Squares inscribed in a triangle, Similarity.
Proposed Problem 69: Square inscribed in a triangle, Similarity.
Proposed Problem 68: Triangle, Incircle, Inradius, Tangent, Similarity.
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