The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
The general formula for the area of a circle is pi times the radius squared. The radius is half the diameter, so the area is pi times half the diameter times half the diameter again.
It depends on the information that you do have. If you know the diameter, the circumference or the area the equations are relatively straightforward.
Area = Pi(d/2)2 where d = diameter
The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.
To calculate this you will need the diameter of the circle. The formula is: diameter/2*pi If you don't know the diameter you can also use the area of the circle: Sqrt(Area/pi) = radius
D=Diameter, pi=3.14159... Area of circle = (D/2)2 * pi
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
The general formula for the area of a circle is pi times the radius squared. The radius is half the diameter, so the area is pi times half the diameter times half the diameter again.
It depends on the information that you do have. If you know the diameter, the circumference or the area the equations are relatively straightforward.
Area = Pi(d/2)2 where d = diameter
Just as there is no formula to find the length of a side of a square when you know the inch, there is no formula to relate a centimetre to a diameter.
If Area of a circle = (2)(pi)(r), and diameter = 2r, then: diameter = 2r = Area of circle / pi, where pi = 3.14
If you have the circumference- You have to divide the circumference by 2*Pi If you know the diameter the radius is simply half the diameter. If you know the area of a circle, the radius can be found using the formula : R = √A/π where: A is the area of the circle and π is Pi, approximately 3.142.
In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.
Use the formula area = pi x radius2. The radius is half the diameter.