Asked by penelope

Three vertices of a parallelogram WXYZ are X(-2, -3) Y(0, 5) and Z(7, 7). Find the coordinates of vertex W.
a
(4, 0)
b
(5, 0)
c
(9, 15)
d
(5, -1)
Answered by Steve
WZ must be equal to and parallel to XY
Y-X = (2,8)
so, Z-W = (2,8)
W = Z-(2,8) = (5,-1)
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