Area of a Rectangle

Area of a Rectangle

GCSE(F),

The area of a rectangle is given by:

`A = bh`

where A is the area, b = base length and h is the height.

A rectangle that is 8 units along its base length, and 4 units high, has an area of 32 units square.

Note that the area units are squared: for example, a rectangle of 5 cm x 3 cm has an area of 15 cm2

Examples

1. What is the area of a rectangle with a base length of 15.5 cm and a height of 4 cm?

Answer: 62 cm2

Area = base x height = 15.5 x 4. Remember the answer is in cm2

2. One side of a rectangular building is completely covered in glass. The area of the glass is 550 m2. If the building is 55m long, how tall is the building?

Answer: 10m

Area = base x height

550 = 55 x h

h = 10