Question

find the area of parallelogram whose diagonals are d1=5i d2=2j

Answer 1

Area = |d1 Xd2|/2 = |10k|/2 = 5sq units 

Answer 2

Area of Parallelogram = Product Of Diagonals / 2
                                       = 5 * 2 / 2
                                       = 5 Sqaure(whatever units has no unit mentioned                                                            here)

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