The rule for the circumference of a circle is:
C = 2piR, where R is the radius.
So if the circumference (C) is 12, then:
12pi = 2piR
Divide both sides by 2:
6pi = piR
Divide both sides by pi,
R = 6
The approximate radius is five (5) inches.
The circumference of a circle that has a radius of 5 inches is 10 X pi or approximatly 31.415926535897932384626433832795. If you know the radius you can find the circumference by multiplying it by 2(pi)
Radius is one-half of the diameter of a circle. Therefore, the radius of an eight-inch diameter circle is four inches. The diameter of a circle is a straight line joining a point on the circumference through the centre to the 'opposite' point on the circumference.
First we have to find the radius: 2*pi*radius = 18*pi Divide both sides by 2*pi to find the radius: radius = 9 inches Area of a circle = pi*radius2 Area = pi*92 = 81pi or 254.4690049 square inches
Circumference = 2*pi*radius or diameter*pi
A circle with a radius of 8 inches has a circumference of 50.27 inches.
To find the radius of a circle, divide the circumference by 2π (approximately 6.28). Therefore, the radius of the circle with a circumference of 232.4 inches is 36.9 inches (232.4 / 6.28).
Circumference = 2 x pi x radius = 31.4159
The approximate radius is five (5) inches.
radius = 20/(2*pi) = 3.183098862 inches
The circumference of a circle that has a radius of 5 inches is 10 X pi or approximatly 31.415926535897932384626433832795. If you know the radius you can find the circumference by multiplying it by 2(pi)
C = 25.13 inches.
c = 22"
That will depend on the length of the radius which has not been given but in general the circumference of a circle = 2*pi*radius or diameter*pi
Circumference = 31.4 inches, approx. Area = 78.5 square inches, approx.
diameter = circumference/pi = 37/3.1416 = 11.8 inches; radius = 1/2 diameter = 5.9 inches; radius = circumference/(2pi) = 5.9 inches = 37/6.2832 = 5.9 inches
find the radius of a circle with circumference of 42.1