Need to know how to find the area of this figuer

The answer is 12 m.

How to solve:

First find out the height of the bottom square, which is done by doing 3 x 3 which gives you 9

Next find out the height of the triangle by doing 5 - 3 which gives you 2

Find out the area of the triangle by doing 2 x 3 which gives you 6. 6 is not the area of one triangle but of two of them as a square. You need to divide 6 by 2 in order to find out the area of the triangle. This gives you 3.

3 + 9 = 12

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer