#### notes

The triangle is right angled, we can directly apply the formula by using two sides containing the right angle as base and height.

Area of a triangle = `1/2 xx base xx height` |

For example :

suppose that the sides of a right triangle ABC are 5 cm, 12 cm and 13 cm; we take base as 12 cm and height as 5 cm in following fig.

Then the area of ∆ ABC is given by

`1/2 xx base xx height`

= `1/2 xx 12 xx 5 cm^2`, i.e., 30 `"cm"^2`.