The perimeter of a parallelogram is the distance around it. To find the perimeter, multiply the length by the width.

The perimeter of a rectangle is the same as its length times its width: P=2l+2w

The perimeter of a triangle is one-half of the sum of all three sides: P=√3s+√3t+√3r

The perimeter of a parallelogram is one-half of the sum of two adjacent sides plus one side across from them, where “across from” means that they form an angle not equal to 90 degrees: P=a+b+c.

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Last modified: August 16, 2022