How do you find the radius of a circle, if they give you the circumference?

Question

for example, If Circumference= 24, find radius.

How do you do that?

Answer 1

c = 2pi x r  Divide both sides by 2pi and multiply by c

r = c / 2pi

r = 24 / (2 x 3.1416)

r = 24 / 6.2832

r = 3.8197

Answer 2

The radius is half the circumference, so divide it in half. The radius of that circle would be 12.

Answer 3

the formula for the circumfernce is 2(PI)r so do this:

2(PI)r=24

then divide bothe sides by 2

(Pi)r=12

Then divide both sides by Pi

r=3.82

Answer 4

pi * diameter = 24 <-- circumference formula. find diameter?

diameter = 24/ pi <-- solve for diameter

(24/ pi)/ 2=?           <-- basically dividing the diamerter by two

                               because it will give u the radius

?= radius

]

** plug it in ur calculator

Answer 5

Circumference =2 times pi times r, so divide circumference by 2 pi. in this example, 24 divided by 2(3.1416)