Problem 73. Three
Intersecting Circles, Cyclic Quadrilateral, Angles.
Level: High School, SAT Prep, College
Given lines 1 and 2, circle 3 passes
through the points A, E, F, B, circle 4 passes through the
points B, F, G, C, and circle 5 passes through the points C, G,
H, D. Prove that AEHD is a cyclic quadrilateral.
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