Area of a Rectangle

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

Study Tips

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Tip #1
A rectangle has four right angles. The sides of a rectangle that are opposite each other have the same length.

Note that, the longer side of a rectangle is the length and the shorter side is the width. Also, a square is a special type of rectangle.

Now, for a rectangle with length l and width w,  its area, A will be:
A = lw
a rectangle with the length l and width w

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

Math Video

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Lesson Video

If the above player doesn't work, try this direct link.

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Math Video 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 area of a rectangle  or pick your choice of question below.
  1. Question 1 on finding the area of a rectangle
  2. Question 2 on finding the width of a rectangle