KöMaL 2023 B5330

Suppose that $a$, $b$, $c$ is a primitive Pythagorean triple, i.e., $a$, $b$ and $c$ are relatively prime positive integers satisfying $a^2+b^2=c^2$. Show an axially symmetrical polygon that can be decomposed into $c$ right-angled triangles with sides $a$, $b$, $c$.