What is the perimeter of an equilateral triangle with a side of 18?

1 Answer
LucaGasparro
Jan 30, 2018

#54cm#

Explanation:

Perimeter is the sum of all the outer lengths.

We know that triangles have 3 lengths. We also know that in an equilateral triangle all the lengths are the same.

#therefore # perimeter #= 3 * 18 = 54cm#

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