Jeff Smith's Math Puzzle for May 23, 2025 - Ah, those Greeks with their horse and the Golden Rectangles. The post Math Puzzle ...

What is the area of the star? Show puzzle solution The regular dodecagon with side length 1 above is composed of a dark blue star and 12 light blue equilateral triangles with side length 1.

Every once in a while, a maths puzzle, brain teaser or exam question ... At first it's easy to keep track of the triangles. There's one big one. One at the top made of three smaller triangles ...