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The length of a side of an equilateral triangle is 5 inches. What is the perimeter?

1 Answer

Dec 1, 2015

$15 inches$ $15" inches"$

Explanation:

An equilateral triangle is a triangle with $3$ $3$ congruent sides. This means that every side on an equilateral triangle has the same length.

In your case, the equilateral has a side of $5$ $5$ inches. This means that all $3$ $3$ sides of the triangle have a length of $5$ $5$ inches.

We want to find the perimeter of the triangle. The perimeter is just the sum of the lengths all the sides of a shape.

Since, in your triangle, we only have $3$ $3$ sides each $5$ $5$ inches long, the perimeter can be found by adding $5$ $5$ to itself $3$ $3$ times:

$perimeter = 5 inches + 5 inches + 5 inches = 15 inches$ $"perimeter"=5" inches"+5" inches"+5" inches"=color(blue)(15" inches")$

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