Question

What is the ratio of the radius to the circumference of any circle, using 3.14 for pi?

Answer 1

r : C = 1 : 6.28

Formula's:

circumference of any circle: 2πr

radius: r

Their ratio:

radius : circumference

r : 2πr

r : 2(3.14)r

1 : 6.28

Answer 2

• 1 : 6.28

Explanation:

The circumference formula is

• C = 2πr or
• C = 2(3.14)r = 6.28r

The ratio of the radius to the circumference is

• r/C = 1/6.28

or

• r : C = 1 : 6.28