Question

If you want to use coordinate geometry to prove that the diagonals of an isosceles trapezoid are congruent, which coordinates of the vertices would you choose for an easy proof?





A.
(b, c), (–b, c), (–a, 0), (a, 0)




B.
(0, c), (2b, c), (–a + b, 0), (a + b, 0)




C.
(0, 0), (2a, 0), (a + b, c), (a – b, c)




D.
(–a, –c), (a, c), (b, 0), (–b, 0)