The adjacent angles of a parallelogram are in the ratio 4:5,then the biggest angle is
a) 60° b)100° c) 80°d)90°
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100.
4x+5x=180.
9x=180.
x=20
4x=80
5x=100
largest=100(b)
4x+5x=180.
9x=180.
x=20
4x=80
5x=100
largest=100(b)
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