Area of a circle = pi*radius2
Area of circle = pi*(radius)2
Volume = 4/3 * pi * radius * radius * radius Surface Area = 4 * pi * radius * radius
The area of a circle with a known radius can calculated using the following formula where r is the radius : A = Pi(r)2
Area of a circle = pi*radius squared
The formula for finding area or mass of a cylinder is pi x radius^2density=massxvolume
It depends on what information you have: its radius and slant height, radius and volume, radius and surface area, surface area and volume, etc.
c=TT R Given the area, the radius = square root (area / Pi). Given the circumference, the radius = circumf/ 2Pi.
2πrh, where 'r' is the radius and 'h' is the height.
It is the formula for finding the area of a circle which means: pi times radius squared
pi*radius2 is the formula for finding the area of a circle.
The formula for finding the radius of a circle is circumference divided by double of pi. If area is given instead of circumference, the radius may be found by dividing the area by pi, then finding the square root of the resultant quotient. It is also equal to half of the diameter, or the diameter divided by 2.
The answer depends on what information you are given: volume and radius or diameter, or surface area and radius, etc.