Question

What is the area of Triangle PQR on the grid? A. 5 square units

B.6 square units
C.10 square units
D.12 square units

Answer 1

The correct option is B.

Explanation:

The area of a triangle is

`A=(1)/(2)bh`

where, b is base of the triangle and h is height of the triangle.

From the given figure it is clear that the base of the triangle is PR = 4 units and the height of the triangle is perpendicular distance of side PR from vertex Q, i.e., 3 units.

Substitute b=4 and h=3 in the above formula, to find the area of triangle PQR.

`A=(1)/(2)* 4* 3`

On simplification we get.

`A=6`

The area of triangle PQR is 6 square units. Therefore the correct option is B.