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Find the area of a parallelogram whose adjacent sides are lengths 10 cm and 12 cm and one diagonal is of length 8 cm

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The Brainliest Answer!
Let a parallelogram ABCD
AB=12; BC=10, and diagonal AC=8
area of parallelogram=2(area of triangle ABC)
we can find the area of triangle by using herons formula 
area=under root{15(15-12)(15-10)(15-8)}
       =15√7 cm^2
area of parallelogram=30√7 cm^2
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