# Pre-Algebra : Perimeter of a Triangle

## Example Questions

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### Example Question #21 : Perimeter Of A Triangle

An equilateral triangle measures  inches along its three equal sides.  What is the area of the triangle?

inches

inches

inches

inches

inches

inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

inches

### Example Question #22 : Perimeter Of A Triangle

An isosceles triangle measures  inches along its two equal sides, and  inches along its third side.  What is the area of the triangle?

inches

inches

inches

inches

inches

inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

inches

### Example Question #23 : Perimeter Of A Triangle

An equilateral triangle measures  inches along its three equal sides.  What is the area of the triangle?

inches

inches

inches

inches

inches

inches

Explanation:

To find the perimeter of any object, simply add the length of each side together.  The best answer is:

inches

### Example Question #21 : Perimeter Of A Triangle

What is the perimeter of an equillateral triangle with side of length 5.5cm?

Explanation:

The formula to find the perimeter of a triangle is

where a, b, and c are the sides of the triangle.  We know that one side of the triangle is 5.5cm.  We also know that an equillateral triangle has 3 equal sides.  Therefore, all sides are 5.5cm.  Using that information, we can substitute into the formula.  We get

Note that we do not combine the labels, only the coefficients.

### Example Question #22 : Perimeter Of A Triangle

What is the perimeter of an equilateral triangle with a base of 6 feet?

Cannot be determined from the information provided

Explanation:

What is the perimeter of an equilateral triangle with a base of 6 feet?

Perimeter is simply the distance around the outside of a shape.

We are asked to find the perimeter of an equilateral triangle. In other words, the three sides must be the same length. In other words, we have three sides, each 6 feet long.