If the diameter is 18 feet then the area is about 254.469 ft².
If the radius is 18 feet then the area is about 1017.876 ft².
452.39 square feet.
A circle with a diameter of 24 feet has an area of 452 square feet.
A circle with a diameter of 18 feet has an area of 254.5 square feet.
Area of the circle in square feet: pi*radius squared
50.24 square feet
153.93804 square feet.
452 square feet.
3.14159265 square feet.
That would be 5026.55 square feet.
16
289
803.84 feet