I don't know how to do this?
p = a + b + c22 = 8 + 5 + c22 = 13 + c22 - 13 = c9 = ca^2 + b^2 = c^2....a and b are the legs and c is the hypotenuse8^2 + 5^2 = 9^264 + 25 = 8189 = 81.......incorrect...no, this is not a right triangle