Question

How can I set up an equation to help solve this problem?

Answer 1

when running a line, in a right-triangle, from the 90° angle perpendicular to its opposite side, we will end up with three similar triangles, one Small, one Medium and a containing Large one. Check the picture below.

`\cfrac{h}{2}=\cfrac{8}{h}\implies h^2=16\implies h=√(16)\implies h=4`