Question

How to find area of triangle

Answer 1

To find the area of a triangle, multiply the base by the height, and then divide by $2$. The division by $2$ comes from the fact that a parallelogram can be divided into $2$ triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

Since the area of a parallelogram is $A=B\times H$, the area of a triangle must be one-half the area of a parallelogram. Thus, the formula for the area of a triangle is:

$Area=\frac{1}{2}B.H$