By using the other information supplied about the circle to calculate either its radius (from which its area can be calculated) or its area (if the circle is similar to another with a given area and some ratio between the two circle is given):
By dividing its diameter by 2 is equal to the radius of a circle and its area is pi*radius2
In a circle, the area of the circle is pi times the radius squared
The area of a circle is 153.86cm².find the radius of the circle
Area of a circle = pi times radius squaredDiameter of a circle = 2 times radius
The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.
Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12
You find the area of a circle with pi times radius squared because the radius is half the circle so to find the full area you need to multiply it again.
Area of a circle = pi*radius2
you take the radius and multiply it by itself. then you multiply the radius squared by 3.14 to get the area of a circle...
If yo have the area of the circle, the square is irrelevant. Radius = sqrt(Area/pi)
πr2
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)