Perimeter of a Triangle

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Lesson Objective
In this lesson, we will learn about the perimeter of a triangle...
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About This Lesson
In this lesson, we will:
  1. Learn about the formula for the perimeter of a triangle.
  2. See an example on using the formula to find a triangle's perimeter.
  3. See another example on using the formula to find the side length of a triangle.
The study tips and math video below will explain more.
a triangle

Study Tips

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Tip #1
The triangle shown on the right has the side lengths of a, b and c. Its perimeter, P, will be the sum of all the side lengths. Hence:
P = a + b + c
a triangle with side lengths of a,b and c

The math video below will give more explanation on this. Also, we will see some examples on how to use this formula.

Math Video

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Video on the perimeter of a triangle
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Video on the examples on using the formula P=a+b+c
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Math Videos Transcript

Practice Questions & More

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Multiple Choice Questions (MCQ)
Now, let's try some MCQ questions to understand this lesson better.

You can start by going through the series of questions on the perimeter of a triangle or pick your choice of question below.
  1. Question 1 on finding the perimeter of a triangle
  2. Question 2 on finding a side length of a triangle 
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