Math: Geometry Problems 577. Activate Flash plug-in or JavaScript and reload to view
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Problem 577: Isosceles triangle, Midpoint, Perpendicular, Concyclic
points, Circle.
Level: Math Education, High School, SAT Prep, College
The figure shows an isosceles triangle ABC
(AB = BC). D is the midpoint of AC and DE is perpendicular to BC. F is
the midpoint of DE and AE intersects BF at G. Prove that the points A, D,
G, and B are concyclic (lie on a same circle).
