(e) Let A,B,C,D be a parallelogram with equal sides (AB = BC = CD = DA). Show that the diagonals AC and BD are orthogona
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(e) Let A,B,C,D be a parallelogram with equal sides (AB = BC = CD = DA). Show that the diagonals AC and BD are orthogona
(e) Let A,B,C,D be a parallelogram with equal sides (AB = BC = CD = DA). Show that the diagonals AC and BD are orthogonal. В. D Hint: AC = AB + BC and BD=BC+CD. +
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