Mathematics, 10.02.2021 09:40 hope4517

A(1.-2), B(6,-1), C(9.3) and D(4,2) are the vertices of a parallelogram. Verify that the mid-points of the diagonals AC and BD coincide.

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A(1.-2), B(6,-1), C(9.3) and D(4,2) are the vertices of a parallelogram. Verify that the mid-points...