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

1 Answer
mason m
Dec 1, 2015

#15" inches"#

Explanation:

An equilateral triangle is a triangle with #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# inches. This means that all #3# sides of the triangle have a length of #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# sides each #5# inches long, the perimeter can be found by adding #5# to itself #3# times:

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

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