Y by kiyoras_2001
Four points on the plane are not concyclic, and any three of them are not collinear. Prove that there exists a point
such that the reflection of each of these four points about
lies on the circle passing through three remaining points.
Proposed by:A Kuznetsov


Proposed by:A Kuznetsov
This post has been edited 1 time. Last edited by Gengar_in_Galar, Mar 11, 2025, 9:49 AM