Question

Suppose the diameter of a circle is 16 units.What is the circumference?

Answer 1

16
`\pi`

Explanation:

Equation for the circumference of a circle

C = 2
`\pi`r or C = d
`\pi`

Insert the diameter into the equation

C = 16
`\pi`

Answer 2

`\approx` 50.24 units

Explanation:

Let's remember that the formula of the circumference of a circle is

C = π * d, where d is the diameter of the circle and π
`\approx` 3.14

As we know the diameter is 16 units, we just replace the d of the formula with 16.

Therefore, C = π * 16 units
`\approx` 3.14 * 16 units = 50.24 units

The circumference of the circle is approx 50.24 units.