Answer:
52 square units
Step-by-step explanation:
The big area (include red squares) is: [tex]6\cdot 11=66[/tex] square units
The small area (only red squares) is: [tex]2\cdot 7=14[/tex] square units
The area shaded in yellow is obtained by subtracting the small area from the big area: [tex]66-14=52[/tex] square units
