the difference between the two adjacent Angles of a parallelogram is 20degree .find measures of all the angles of the parallelogram
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Let the measure be x then,
the adjacent angle be x-20
therefore, x+x-20+x+x-20=360
4x=400
x=100
the adjacent angle be x-20
therefore, x+x-20+x+x-20=360
4x=400
x=100
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