The equation for circumfrance is 2(pi)r (pi meaning the constant 3.14159, rounded). To find the radius if the circumfrance is known, you would re-arrange this equation to solve for r - it would go from C=2(pi)r into r=C/2(pi).
c = circumference, r = radius.
If the circumference is 2*pi*r, then r = c/(2*pi)=
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
Using the circumference, you would find the radius first. The circumference C = 2*Pi*r where r is the radius. Then, the area of the circle = Pi*r^2.
Circumference = 2*radius Area = 2*pi*radius2 Area = 2*pi*(circumference/2)2
The circumference of a circle with a known radius and can calculated using the following formula: C = 2Π(r)
Circumference = 2*pi*radius In this case radius = 5 units so circumference = 31.4159 units approx.
Circumference of a circle = 2*pi*radius
divide the circumference by pi (3.1416) and divide the product by two that will give you the radius
To find the circumference of a circle, you need to multiply the radius by 3.14.
If you know the circumference then divide that by (2 x pi) and you will get the radius. The width is unnecessary information.
Circumference = 2*pi*radius So the radius = circumference/2*pi
By using the equation 2πr that is used to find the circumference, you get 12.56m
Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)
Circumference = 2*pi*radius
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
To find circumference you must multiply twice the radius by π, or using the diameter, if it gives it to you, multiply that by π.
Circumference = 2*pi*radius So Radius = Circumference/(2*pi)
Divide the circumference by 2pi(3.14). That will give you the radius.Square the radius and multiply by piThat will give you the area.Calculate the radius by dividing the circumference by 2pi. Then square the radius and multiply by pi to get the area.