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The adjacent sides of a parallelogram are 21 cm and 28 cm. If its one diagonal is 35 cm; find the area of the parallelogram.

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The adjacent sides of a parallelogram are 21 cm and 28 cm. If its one diagonal is 35 cm; find the area of the parallelogram.

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Diagonal of || gm divides it into equal parts 

areaof || gm  = 2 x area of ΔABC

= 2 x 294

= 588 cm2 Ans.

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