Profile You are not logged in. Please leave this field empty Donâ€™t miss these puzzles! Subscribe to the weekly geometry puzzle e-mail. Email Address * Check your inbox or spam folder to confirm your subscription.

There is even an "easier" solution that applies a projective transformation, respecting the circle, but moving the reflection point on…

Quadrilateral AFEB is cyclic because angle A and E are 90. Hence, point O is circumcenter of cyclic quadrilateral ABEF.…

Area of Rectangle is 1/2