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A Review of the Perimeter of a Pentagon in Geometry

The perimeter of a pentagon is the total length of the sides of the pentagon. In this lesson, we will review the perimeter of a pentagon and how to calculate it. We will also provide some practice problems for you to try on your own.


How to Calculate the Perimeter of a Pentagon

To calculate the perimeter of a pentagon, you will need to know the length of each side. You can then add up all of the lengths of the sides to find the total length, which is the perimeter.


For example, let's say that you have a pentagon with sides that are all 5 centimeters long. To find the perimeter, you would add up all of the side lengths to get 5 + 5 + 5 + 5 + 5 = 25 centimeters.


Note that the order in which you add up the sides does not matter. You will always get the same answer as long as you include all five sides.


Now that we've reviewed how to calculate the perimeter, let's try some practice problems!


Practice Problems

1) Find the perimeter of a pentagon with sides that are 3 feet long.

2) Find the perimeter of a pentagon with sides that are 4 inches long and 2 inches long.

3) Find the perimeter of a pentagon where two sides are 10 yards long, two sides are 12 yards long, and one side is 8 yards long.

4) Find the perimeter of a regular pentagon where each side is 6 centimeters long.

5) Find t he perimeter of an irregular pentagon where one side is 5 feet long, two sides are 4 feet long, one side is 6 feet long, and another side is 7 feet long.

Answers: 1) 3 + 3 + 3 + 3 + 3 = 15 feet 2) 4 + 2 + 4 + 2 + 4 = 16 inches 3) 10 + 12 + 10 + 12 + 8 = 52 yards 4) 6 + 6 + 6 + 6+ 6= 30 centimeters 5) 5+4+4+6+7= 26 feet

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