Question

The side opposite the right angle triangle is 13 cm, one of the other side is 12 cm. what is the area of the triangle

Answer 1

by heron s formula
hope it helps you

Answer 2

By pythagoras theorem we find that the other side containing the right angle is 5 cm.

Areaof triangle
$\frac{1}{2} \times 5 \times 12 \\ = 30 \: {cm}^{2}$