The grid you see below is in the shape of a rectangle. What is the area, in square
units, of the shaded part?

The area of the shaded region is .

Step-by-step explanation:

On the attached figure, a rectangle is shown. It is required to find the area of the shaded part. The shaded part forms a triangle. The area of a triangle is given by :

b is base and h is height

From this figure, each box is a square of side 1 unit say.

Its height will be 4 units and its base is 9 units

So,

So, the area of the shaded region is .