How to find the length of the side of an equilateral triangle

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SSAT Upper Level Quantitative › How to find the length of the side of an equilateral triangle

Questions 1 - 8
1

The perimeter of an equilateral triangle is 39 meters. In meters, how long is one side of the triangle?

Explanation

An equilateral triangle has sides that are the same length. Then, to find the length of one side, you only need to divide the perimeter by 3.

2

The perimeter of an equilateral triangle is . What is the length of one side of the triangle?

Explanation

Since an equilateral triangle has sides that are all the same, divide the perimeter by to get the length of each side.

3

An equilateral triangle has a perimeter of units. What is the length of each side?

units

units

units

units

Explanation

Because an equilateral triangle has three sides that are the same length, divide the given perimeter by 3 to find the length of each side.

4

The perimeter of an equilateral triangle is . What is the length of one side of this triangle?

Explanation

Since an equilateral triangle has three equal sides, divide the perimeter by to find the length of each side.

5

The perimeter of an equilateral triangle is . What is the length of one side of this triangle?

Explanation

Since an equilateral triangle has three equal sides, divide the perimeter by to find the length of one side.

6

The perimeter of a equilateral triangle is . In meters, what is the length of a side of this triangle?

Explanation

Since all three sides are equal in an equilateral triangle, we can just divide the perimeter by 3 to find a side length.

7

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

Explanation

Because all the sides in an equilateral triangle are equal, we can just divide the perimeter by 3 to find the length of a side.

8

What is the difference between an equilateral triangle and a scalene triangle?

The length of their sides

The number of side lengths

The sum of their angle measurements

The sum of their side lengths

Their color

Explanation

Of the choices listed, the main difference between an equilateral triangle and a scalene triangle is their side lengths. An equilateral triangle has to have equal sides, but a scalene triangle can have all different side lengths.

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