The the measures of two adjacent angles of a parallelogram are in ratio 4 :5 find their measures
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4:5
4x + 5x +4x + 5x (opposite angles of a parallelogram are equal)
18x = 360
x =360/18
x = 20
4x = 80
5x = 100
angles are 100 and 80
4x + 5x +4x + 5x (opposite angles of a parallelogram are equal)
18x = 360
x =360/18
x = 20
4x = 80
5x = 100
angles are 100 and 80
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