The perimeter of a parallelogram is 80cm one side is 10cm more than the other side what is the length of the side?
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sides are x and x+10
perimeter of parallelogram= 2×(l +b )
80cm=2(x+x+10)
80cm=4x+20
(80-20)÷4=x
x=15
x+10=25
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