Answer:
144 square feet
Step-by-step explanation:
First. the base is 6 by 6, meaning the surface area of it is 36 square feet. Then, we do a single triangle, whose area is (6*9)/2, or 27. 27*4 is 108, so the answer will be 108+36=144.
Answer is: 144 square feet
Have a great day! :)
