A tiny circle inscribed between a circle, a square and a horizontal line. A geometry puzzle

A tiny circle inscribed between a circle, a square and a horizontal line. A geometry puzzle

This puzzle is about a tiny circle inscribed between a circle, a square and a horizontal line. Follow me:   / sybermath   Click!!!: https://www.youtube.com/SyberMath?sub... Tangent circles, Pythagorean Theorem, Circles and squares, A geometry puzzle