Answer:

Step-by-step explanation:
The area of a rectangle is length times width.
We divide the polygon into 4 rectangles:
The area of the first rectangle is :

The area of the second rectangle is

The area of the 3rd rectangle is

The area of the fourth rectangle is

Putting all together, the area of the polygon is;
0.16+1.44+1.6+0.4=3.6m²