circumference is the distance around a circle
diameter is the distance from one point on the circle, straight across to the other side.
radius is distance from the center of the circle to any point on the circle
radius = r
diameter = 2r
circumference = 2(pi)r
pi = 3.1415927
Circumference = 2(pi)r where pi = about 3.14 and r is the radius
Radius is half the circumference
If the figure is truly a circle, then the circumference is (Radius) x (2 pi) .
The circumference is ALL the way around the circle, while the radius is only HALF way into the middle of the circle. I'm guessing you meant "What is the relationship between the radius of a circle and its circumference?" Radius is half of the diameter of a circle, circumference is PI times diameter; therefore, the circumference is PI times two times radius.
For any given circle, the circumference is equal to the radius multiplied by 2 x pi.
circumference of of circle / Radius of the circle
relationship of circumference and radius
Circumference = 2*pi*Radius Diameter = 2*Radius Circumference = pi*Diameter
Pi and the radius can be used to find the area (PiR^2) or the circumference (2RPi) of a circle, where R is the radius.
There is a constant relationship between the radius of a circle and its circumference. This is expressed in a formula.
any circles circumference divided by its diameter will equal pi, or 3.14159 approximately
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Circumference = 2*pi*radius Radius = Circumference/(2*pi)