ABCD is a parallelogram with coordinates A(4, 2), B(3,-1), C(-1,-1), and D(-1, 2). To prove that ABCD is a rhombus, you would

Question

ABCD is a parallelogram with coordinates A(4, 2), B(3,-1), C(-1,-1),
and D(-1, 2). To prove that ABCD is a rhombus, you would plot the parallelogram
on a coordinate plane and then find which of the following?
(A) measures of the angles
(B) lengths of the diagonals
(C) slopes of the diagonals
(D) midpoints of the diagonals

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