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Problem 574: Circle, Chord, Secant, Angle Bisector, Perpendicular.
Level: High School, College, Math Education.

The figure shows a circle O. The chords AB and CD meet at E. AD and CB meet at F. Prove that the bisectors of angles AED and AFB are perpendicular.

CIrcle, Chords, Angle bisector, 90 Degrees



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