A regular octagon with two diagonals and a square. Prove that the four red points are concyclic.
Scroll down for a solution to this problem.
Solution

A regular octagon with two diagonals and a square. Prove that the four red points are concyclic.
Scroll down for a solution to this problem.

A regular octagon with two diagonals and a square. Prove that the four red points are concyclic. https://t.co/2JLlJ2VHcw Inspired by @puzzlist pic.twitter.com/eyJIMSwCpN
— Mirangu (@Mirangu1) February 9, 2024
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