The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!
You times the radius by 2.
Divide the diameter by 2.
Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi
you cant: pi is the same for any circle - 3.1415... the diamter or the radius has to be given diameter divided by two equals the radius the radius times two equals the diameter
Double the radius
you have multiplythe radius by 2 to get the diameter
The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!
You times the radius by 2.
Divide the diameter by 2.
Diameter of a circle = 2*radius Circumference of a circle = 2*radius*pi
you cant: pi is the same for any circle - 3.1415... the diamter or the radius has to be given diameter divided by two equals the radius the radius times two equals the diameter
The longest chord in a circle is its diameter and halve of this is its radius.
circumference of a circle = 2*pi*radius or pi*diameter
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.
multiple the diameter by 2 to get the radius, then use your equation and go from there