To ask for the area of this irregular figure, you can find the area of this big rectangle, and then subtract the areas of the three triangles in the figure, which is the area of this figure.

S large rectangle = 16 small rectangle * area of each rectangle = 16* 1= 16.

From left to right, the area of the triangle is expressed as S 1. S2 S3

s 1 = 4 * 1/2 = 2 S2 = 3 * 3/2 = 4.5 S3 = 3 * 3/2 = 4.5

Subtract the area of each triangle from the total rectangle, which is: S shadow = 16-2-4.5-4.5=5.

Original!