Question

What is the exact circumference of the circle?

2π cm
4π cm
8π cm
16π cm

Circle with center D and diameter of 8 cm labeled.

Answer 1

For this case, we have that by definition, the circumference of a circle is given by:

`C = \pi * d`

Where:

d: Is the diameter of the circle given by 2r, that is, twice the radius.

If we have a circle with a diameter equal to 8cm, then the circumference is given by:

`C = \pi * 8 \ cm`

ANswer:

Option C

`8 \pi \ cm`

Answer 2

The correct answer is option 3). 8π cm

Explanation:

Formula for circumference of circle

circumference = 2πr where r is the radius of circle.

It is given that, Circle with center D and diameter of 8 cm labeled.

To find the circumference

diameter = 8cm

radius = diameter/2 = 8/2 = 4

circumference = 2πr

circumference = 2 * π * 4 = 8π

Therefore the circumference of given circle is

The correct answer is option 3). 8π