ABCD is a parallelogram DE 1 AB and
DF I BC. If AB = 30 cm, DE = 8 cm and
DF = 12 cm, find BC.
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Answer:
Taking DE
Area of parallelogram=DE×AB
=8×30
=240cm²
Taking DF
Area of parallelogram=DF×BC
=> 240 =12×BC
=>BC=20cm
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