# Area of triangles

To calculate the area of a triangle, draw a second triangle to form a rectangle.

### Example

The area of the rectangle is 8 cm2.

Two triangles make the rectangle. The area of one triangle is half the area of the rectangle.

$8 \div 2 = 4~\text{cm}^2$

The area of a triangle can also be calculated using the formula:

$\text{area of a triangle} = \frac{1}{2} \text{base} \times \text{height}$

or

$\text{area of a triangle} = \frac{\text{base} \times \text{height}}{2}$

In this case:

$\frac{2 \times 4}{2} = 4~\text{cm}^2$