If vz = 5 cm, zx = 4 cm, vx = 7 cm, and pq = 3.2 cm, what is the measure of rp?

Just tell me how to set up the equation.

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*