Question

A circle has diameter 12. What's the circumference?

a
24π
b
12π
c
36π
d
144π

Answer 1

b. 12π

Explanation:

C= 2πr

R= D/2= 12/2= 6

C= 2x3.14x6

2x6= 12

C= 12π

Answer 2

Given :-

• diameter of circle = 12

Then,

• Radius will be circle= 12/2 = 6

Explanation

Using Formula

★Circumference of circle = 2πr

Keep Value

==> Circumference of circle = 2π × 6

==> Circumference of circle = 12π

Hence

• your answer will be option number b.