Question

Find the exact circumference of a circle with diameter equal to 8 ft.

Answer 1

C = 8π

Explanation:

The circumference (C) of a circle is calculated using

C = πd ← d is the diameter

here d = 8, hence

C = 8π ft ← exact value

Answer 2

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

`C = \pi * d`

Where:

d: It is the diameter of the circle

We have as data that the diameter of the circle measures:8ft, then, replacing:

`C = \pi * 8`

Finally, the circumference is
`8\pi`

ANswer:

`8\pi`