Base: 8 cm
Height: 5 cm
Area: 40 cm
The base of this shape is 8 cm because, the line on the top is the same as the base.
The height of this shape is 5 cm because, as shown in the first photo below, the total height is 5.
The area is just base*height.
8*5=40
So, the area is 40 cm.
Hope this helps!
Let mw know if you need anything else :)