Answer:
18 square units
Step-by-step explanation:
The top line has 5 shaded squares
The next line has 5 shaded squares
The third line from the top has 2 squares
The fourth line from the top has 2 squares
The fifth line from the top has 2 squares
The sixth line from the top has 2 squares
Add them together
5+5+2+2+2+2 = 18
18 square units
