PARKING Stephanie is drawing the layout of a parking lot on a coordinate grid and needs to verify that two sides meet in a right angle. In her sketch, one side of the parking lot has endpoints A(0,0) and B(50,0). The second side of the parking lot has endpoints B(50,0) and C(18, 24). How can Stephanie prove that the two sides of the parking lot meet in a right angle? Select all that apply.