Question

The circumference of a circle with a radius of 1 is 2π. Set up a proportion to find the circumference of a circle with a radius of 6.

Answer 1

6 radius = 2π x 6

= 12π

Explanation:

Circumference of a circle

C = 2πr

here r is radius of circle and 2π is constant is we can say that circumference of a circle is directly proportional to it's radius.

C ∡ r

Given in the question that circumference of a circle with a radius of 1 is 2π.

1 radius = 2π

6 radius = 2π x 6

= 12π