Question

I don't know how to find the area

Answer 1

To find the area you need to multiply.

Answer 2

To find the area you do A=bh for each individual rectangle then add them all together.

On your paper, you divided each side by two and put that for the parallel side which is incorrect. You just use the original amount for the other side.

So, 20 × 5 = 100. ((For two sides))
30 × 5 = 150 ((for two sides))
30 × 20 = 600 ((middle))

Add them up, 100+100+150+150+600=1100.

So, the area is 1100 in^2, or 1100 square inches.

I hope that helps!