Geometry Puzzle: What’s the Radius?

In this math video I (Susanne) explain how to solve this geometry puzzle, where we have a large square containing a smaller square and a circle. The circle and the inner square touch each other at the center of the circle. Using the Pythagorean theorem and a bit of algebra, we find the radius of the circle step by step. This video is perfect for anyone studying geometry, preparing for math exams, or just loves solving interesting math problems. Mathematics explained.

00:00 Intro – Geometry Puzzle
1:02 How to solve this
3:57 Diagonal Square
6:55 Finding x
10:27 Solving the Equation
12:27 See you later!

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​⁠ ‪@MathemaTrick‬

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