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Perimeter of a rectangle

This math skill teaches how to calculate the perimeter of a rectangle by adding the lengths of all four sides, where opposite sides have equal lengths.

Learn perimeter of a rectangle

Teaching Transcript

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Let's find the perimeter of a 4 by 12 rectangle

Perimeter is the full distance around the outside

For rectangles, opposite sides are the same length, so the side lengths are 4, 4, 12, and 12

Adding these together, we find our perimeter, of 32

Skill Practice

Perimeter of a rectangle

Test your understanding of perimeter of a rectangle by practicing it! Work through the below exercises to use it in practice.