Two adjacent angles of a parallelogram are in the ratio 4:5.Find the measure of each of it's angles class 08
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let the proportionality constant be x
4x+5x=180
9x=180
x=180/9=20
then,4x=4×20=80
and,5x=5×20=100
4x+5x=180
9x=180
x=180/9=20
then,4x=4×20=80
and,5x=5×20=100
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