SOLUTION: the sides of a parallelogram have lengths of 12 cm and 15 cm. find the lengths of the sides of a similar parallelogram with a perimeter of 90 cm.

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Question 288428: the sides of a parallelogram have lengths of 12 cm and 15 cm. find the lengths of the sides of a similar parallelogram with a perimeter of 90 cm.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
2*12+2*15=24+30=54
24/54=2x/90
30/54=2y/90
2x=40
2y=50
x=20 y=25