Best Answer

Diameter = radius * 2

Circumference = pi * diameter.

Q: How do you find the diameter and then the circumference if you have the radius?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

Diameter = circumference/pi Radius = circumference/2*pi

pi X diameter finds the circumference so circumference divided by pi will leave the diameter. half the diameter to find the radius

Divide circumference by pi, that gives diameter. Radius is half of diameter

You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).

If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)

Related questions

Diameter = circumference/pi Radius = circumference/2*pi

pi X diameter finds the circumference so circumference divided by pi will leave the diameter. half the diameter to find the radius

Divide circumference by pi, that gives diameter. Radius is half of diameter

Okay finding circumference from knowing the radius right? The radius is equal to half the diameter and circumference is equal to pi * diameter. So double the radius and multiply it by 3.14 then you will get the circumference!

You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).

If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)

Diameter = Radius*2 = 14 units. Circumference = pi*Diameter = 43.98 units.

circumference of a circle = pi*diameter or 2*pi*radius

divide the circumference by pi ( 3.146) which will give you the diameter divide that by 2 and you have the radius

Radius is diameter divided by two. Diameter is radius times two or circumference divided by pi. Circumference is diameter times pi. Pi is roughly 3.14

to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!

Circumference = Pi times diameter. So double the radius to find the diameter. Multiply by Pi (3.14159)