Answer to Question #41701 in Mechanics | Relativity for Sanjeev

Question #41701

If a and b are two sides of a parallelogram and c and d are the diagonals then :-
(1) c2 + d2 = a2 + b2
(2) c2 + d2 = 2 (a2 + b2)
(3) c2 – d2 = a2 – b2
(4) c2 – d2 = 2 (a2 – b2)

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