How to Find the Area of a Rectangle

Finding the Area of a Rectangle

The area of a rectangle is found using the formula:

In this formula, b is the length of the base of the rectangle and h is the height of the rectangle. The image below shows what we mean by the length of the base and the height:

Interactive Widget

Use this interactive widget to create a rectangle and then calculate its area. Start by clicking in the shaded area.




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How to Find the Area of a Rectangle

Finding the area of a rectangle is easy.

Question

What is the area of a rectangle with a base of 8 cm and a height of 5 cm, as shown below?

Step-by-Step:

1

Start with the formula:

Area = bh

Don't forget: bh = b × h

2

Substitute the length of the base and the height into the formula. In our example, b = 8 and h = 5.

Area = 8 × 5 = 40 cm2

Answer:

The area of the rectangle with a base of 8 cm and a height of 5 cm is 40 cm2.

Slider

The slider below shows another real example of how to find the area of a rectangle.

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See Also

What is a rectangle?