Using Properties of Rectangles, Triangles, and Trapezoids

Question

Find the length of each side of an equilateral triangle with perimeter 18 meters.

Answer 1

By definition, an equilateral triangle has three equal sides. The perimeter is 18. Therefore, the three equal sides added together must equal 18. Let's call each side x.

x + x + x = 18

3x = 18x = 6

The length of each side is 6 meters.