Saturday, August 29, 2020

A challenging problem from Geometry

 

The triangle ABC is given. Let T be circle passing through vertex A and intersecting sides AB and AC in points D and E respectively. Let T' be circle passing through vertex B and point D, intersecting side BC and the circle T in points F and T, respectively. Prove that the quadrilateral CEFT is cyclic.


For solution click here: Solution

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