To find the area of this kind of shape, you need to divide the shape into parts. Let’s cut the top. So we have a small rectangle and a big rectangle now.
Let’s solve for the smaller one first.
The area of a rectangle is length x width. So the length is 16cm and the width is 3cm.
16 • 3 = 48cm
The area of the smaller rectangle is 48cm.
Now let’s solve for the larger rectangle.
The length is 22cm. You find that by doing 16+3+3. The width is 11cm.
22 • 11 = 242cm.
The area of the larger rectangle is 242cm.
Now to find the area of the whole thing, add the area of the rectangles.
48cm + 242cm = 290cm.
The area of the polygon is 290cm.