Adjacent Sides of a parallelogram are 11 cm and 17 cm. If the length of one of its diagonals i cm, find the length of the other diagonal.
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Sides of a parallelogram and diagonal of the parallelogram are related as:
d12+d22=2(a2+b2) where a and b are sides and d1 and d2 are diagonals
Given, a = 11 cm, b = 17 cm and d1=26cm
262+d22=2(112+172)
676+d22=2(121+289)
d22=144
d2=12cm
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