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 8 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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