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OpenStudy (mayankdevnani):
Two adjacent sides of a parallelogram are 51 cm and 37 cm. One of its diagonals is 20 cm, then its area is..... a) \[412 cm^2\] b) \[512 cm^2\] c) \[612 cm^2\] d) \[712 cm^2\]
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OpenStudy (anonymous):
Use herons formula to calculate the area of one half of the parallelogram.
OpenStudy (anonymous):
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