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Perimeter of a triangle

This skill teaches how to calculate the perimeter of a triangle by adding up the lengths of all its sides.

Learn perimeter of a triangle

Teaching Transcript

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Let's find the perimeter of this triangle

The perimeter is simply the distance around the outside, so let's add up all the side lengths.

8 plus 10 plus 6 is 24.

Skill Practice

Perimeter of a triangle

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