How do you find the circumference of a circle using the radius?

Question

How do you find the circumference of a circle using the radius?

Answer 1

+ it

Answer 2

C=2PixR



C is the circumference

Pi is 3.14

R is the radius

multiply 2 x 3.14 x radius and you get circumference.....

Answer 3

use a scientific calculator

C = 2πr

r=radius

C= circumference

OR

C = πd   d=diameter

Answer 4

very simple

the circumference of a circle is PI * d

PI = 3.142

radius is half the diamater

so following this logic the diamter must be twice the radius

so lets say your radius is 4

so your diamter is 2 * 4 = 8

3.142* 8 = 25.136

i hope this example helped

Answer 5

The number Pi is the ratio of the circumference of a circle to the diameter. The value of Pi is approximately 3.14159265358979323846...The diameter of a circle is twice the radius. Given the diameter or radius of a circle, we can find the circumference. We can also find the diameter (and radius) of a circle given the circumference. The formulas for diameter and circumference of a circle are listed below. We round Pi to 3.14 in order to simplify our calculations.

d=2r

C equals Pi times d

Answer 6

circumference is two times the radius times pi

c= (2)(pi)(r) or c= (diameter)(pi)

Answer 7

The circumference of a circle is equal to 2 * pi (~3.14) * the radius.