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# What Is the Perimeter of a Triangle?

**The perimeter of a triangle is the total distance around its three outer sides.** If a triangle has side lengths equal to D, E and F, then its perimeter is the addition of D, E and F.

When three sides of a triangle are all equal, the shape is called a equilateral triangle. The perimeter of an equilateral triangle, which has each side length equal to A, has a perimeter equal to (A + A + A), or 3A.

For any polygonal shape, the perimeter is given as the distance around its outer sides. A square, which has four sides with lengths each equal to Y, has a perimeter equal to 4 x Y. Similarly, a rectangle, which has two sides equal to R and the other two equal to S, has the perimeter of (2 x R + 2 x S).

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## How Do You Find the Perimeter of a Triangle?

A: To find the perimeter of a triangle, use the equation P=A+B+C, where P is the perimeter and A, B and C are the lengths of each of the three sides of a tria... Full Answer >Filed Under: -
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## How Can You Find the Perimeter of a Hexagon?

A: Determine the perimeter of a hexagon by adding the length of its 6 sides. If it is a regular hexagon, where the lengths of all sides are equal, the perimet... Full Answer >Filed Under: -
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## How Do You Use a Formula to Find the Perimeter of a Triangle?

A: You can calculate the perimeter of any object by adding the length of its sides. With a few simple measurements, you can quickly find the perimeter of a tr... Full Answer >Filed Under: -
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## What Is the Perimeter of a Rectangle?

A: The perimeter of a rectangle is the sum of the length of all four sides. Alternate formulas for finding the perimeter are 2(length + width) and 2 x length ... Full Answer >Filed Under: