Complete the coordinate proof for the parallelogram determined by the points A(2,4), B(4,-1), C(-1,-3), D(-3,2).
Prove that ABCD is a rectangle.
BD = /1-3 - 4)2+(2+ 1)2 = 0
AC = /1-1-2)2+(-3-4)2 =
The diagonals (select) congruent, so ABCD (select) va rectangle.