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YouTube

Can You Find the Blue Area? - Geometry Puzzle Without Trigonometry

Wrath of Math via YouTube

Overview

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Tackle a challenging geometry puzzle from Archimedes Lab in this 16-minute mathematical video that requires finding the blue area of a square with a vertex on a circle inscribed in a semicircle—without using trigonometry. Learn how to apply the angle bisector theorem, similar triangles, and the Pythagorean theorem to solve this elegant problem. The video methodically walks through the solution process, starting with helpful hints before building the mathematical framework needed to express the square's area in terms of the semicircle's diameter. Perfect for geometry enthusiasts looking to sharpen their problem-solving skills through classical geometric reasoning.

Syllabus

0:00 Intro
1:24 Hints
2:05 Solution Start
4:59 Beginning Assertions
5:52 Angle Bisector Theorem
8:08 Similar Triangles
9:51 Pythagorean Theorem
14:11 Finding the Area
15:27 Conclusion

Taught by

Wrath of Math

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