Area of a circle = pi multiplied by (radius squared)
Pi is approximately 3.141 so do r x r x 3.141
The formula for the area of a circle is: Area = (pi) x (Radius)2 . When you know the radius of the circle and you use it to calculate the area of the circle, the result will be equal to (pi) x (Radius)2 .
Use the formula for the area of a circle (area = pi x radius squared), replace what you know (in this case the area), and replace - in this case - for the radius.
Area of a circle equals pi r2 Therefore the radius of a circle equals the square root of (area divided by pi).
Radius is the square root of (area divided by pi).
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
Area of a circle = pi*radius2
The formula for the area of a circle is: Area = (pi) x (Radius)2 . When you know the radius of the circle and you use it to calculate the area of the circle, the result will be equal to (pi) x (Radius)2 .
Use the formula for the area of a circle (area = pi x radius squared), replace what you know (in this case the area), and replace - in this case - for the radius.
Radius = +sqrt(Area/pi)
Area of a circle equals pi r2 Therefore the radius of a circle equals the square root of (area divided by pi).
Radius is the square root of (area divided by pi).
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
If you know the circle's Radius, the area is [ pi times r2 ]. If you know the circle's Diameter, the area is [ 1/4 pi D2 ].
The only piece of information required to find the area of a circle is the radius of the circle. Once you know the radius of the circle, the area is simply the radius squared multiplied by pi (approximately 3.14).
Yes the radius does affect the area of a circle. In fact to find the area of a circle people need to know the radius. The radius is half way between the middle of a circle to any of it's edges. The formula for the area of a circle ispi*radius squaredYou must first find the square of the radius and multiply it by pi(3.14.) For more help go to Wikipedia.com and type circle.
If you do not have the area, what do you have? The radius is half the diamiter The radius is PieR2 Worked backwards if you know the circumfrence.