Two squares and an extended side. Prove that red : green = blue : yellow.
Scroll down for a solution to this problem.
Solution

It might be good to look at this puzzle again to be sure those angles are indeed equal.
Two squares and an extended side. Prove that red : green = blue : yellow.
Scroll down for a solution to this problem.
It might be good to look at this puzzle again to be sure those angles are indeed equal.