If the 18 stands for the radius, then the area formula : A= Pi r2 can be used. The question is standed strangely.
That depends on why you need the square footage. For building permits, tax assessments, etc. it is the outside; for floor covering of course the inside...
Pxr2
If you mean a circle then its square footage formula is: pi*radius2
The square footage of a radius is meaningless, but if you mean the square footage of a circle of radius say R, the answer is 3.142 x R x R
Area of a circle = pi*radius2 measured in square feet
That depends on why you need the square footage. For building permits, tax assessments, etc. it is the outside; for floor covering of course the inside...
The square footage of a circle that measures 159 feet in circumference is about 2,012 square feet.
Pxr2
Area of a circle = pi*radius2
If you mean a circle then its square footage formula is: pi*radius2
The square footage of a radius is meaningless, but if you mean the square footage of a circle of radius say R, the answer is 3.142 x R x R
10,354.9 square feet.
Area of a circle = pi*radius2 measured in square feet
7850
490.87
Multiply the diameter by 3.1415 NO - ignore that! Diameter x pi (3.1416) is the circumference, the distance around a circle. Square footage is area, so the correct formula is Area = 3.1416 times radius squared. The radius would be measured in feet.
Area of a circle = pi*radius2