Square feet are square feet. There is not a measure called radius square feet.
45000 square feet = 45000 square feet
2178 square feet.2178 square feet.2178 square feet.2178 square feet.
154 square feet.
You multiply the two dimensions to get square feet. That would be 154 square feet.
25 feet by 35 feet = 875 square feet.
800 square feet.
1,323 feet = 9.1875 square feet.
285 square feet.
1,400 square feet.
624 square feet.
There are linear feet, and square feet, but no "linear square feet".