Let ABCD be a parallelogram. The lengths of the side AD and the diagonal AC are 10 cm and 20 cm, respectively. If the angle ∠ADC is equal to 30° then the area of the parallelogram, in sq. cm, is
Started 10 months ago by Shashank in
Explanatory Answer
Revising the Cosine rule and the area of the triangle using the Sine rule…
We draw the described parallelogram ABCD.
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