A parallelogram has a perimeter of 54 centimeters. Two of the sides are each 17 centimeters long. Wh

A parallelogram has a perimeter of 54 centimeters. Two of the sides are each 17 centimeters long. What is the length of each of the other two sides?

A parallelogram is a rectangle bent on it's side. So we have the perimeter formula P below:
P = 2l + 2w

We're given w = 17 and P = 54. So we plug this into the formula for perimeter:
2l + 2(17) = 54
2l + 34 = 54

Using our equation calculator, we get l = 10.