Geometry

Related Content

Thank you!


On behalf of our dedicated team, we thank you for your continued support. It's fulfilling to see so many people using Voovers to find solutions to their problems. Thanks again and we look forward to continue helping you along your journey!




Nikkolas and Alex
Founders and Owners of Voovers

Perimeter of a Pentagon

The Perimeter Formulas

There are two formulas for finding perimeter of a pentagon.
For a regular pentagon where all sides are the same length, the formula is given as:
P = 5s
Where P is the perimeter and s is the side length.

For an irregular pentagon where the sides are not all the same length, the formula is given as:
P = a + b + c + d + e
Where ae are the lengths of each side.

perimeter of a pentagon

Example Problems

Problem 1:
Find the perimeter of a regular pentagon with a side length of 15.

Solution:
Since we know this is a regular pentagon, we can plug the side length 15 into the regular pentagon formula.
P = 5s
P = 5(15) = 75
The perimeter is 75.

Problem 2:
In irregular pentagon has side lengths a = 2.36, b = 4.01, c = 3.12, d = 3.22, and e = 4.41. What is the perimeter?

Solution:
Let’s plug the side lengths into the irregular pentagon formula.
P = a + b + c + d + e
P = 2.36 + 4.01 + 3.12 + 3.22 + 4.41 = 17.12
The perimeter is 17.12.

Scroll to Top