Cool Geometry Problem Redux
Find the area of the big triangle. [Matt Enlow]
piled squares
15-75-90 problem meets an old friend or two
The theme of this post is connections. We’re going to start with a problem that suggests another few I’ve talked about before and I promise a 15-75-90 connec...
Heron’s Formula vs Trigonometry
This random pedagogical thought occurred to me today: Both Heron’s Formula and the Law of Cosines provide ways to find the area of a triangle with just its ...
Cool Geometry Problem
I ran into another problem that I think demonstrates an unexpected and interesting fact