Question

What is the circumference of a diameter of 16 centimeters using 3.14 pi

Answer 1

Answer: 50.24 centimeters (cm.)

Explanation:

To find the circumference, or perimeter of a circle, we use the formula
`C = 2\pi r` (or
`C = \pi d`) with
`C` representing the circumference,
`\pi` being the symbol for the irrational number pi, and
`r` representing the radius of a circle. The radius of a circle is half the diameter (
`d`), and the diameter being a straight line from one end to another (passing through the center) of a circle. I’ve attached a photo labeling a radius and diameter of a circle, if a visual helps.

Since pi is an irrational number, it never ends. Most people use the abbreviation 3.14 to represent pi.

We know the diameter of the circle is 16. You can use the formula
`2\pi r` or
`\pi d` to solve for the circumference of a circle. In this case, it’s easier to use
`\pi d`.

Using the formula
`C = \pi d`, and after substituting the given values, you get the following result:

`C = \pi d`

`C = 3.14 (16)`

`C = 50.24 cm.`

Note: Don’t forget to add a unit (if provided) to the end of your answer. In this case, we use centimeters (abbreviated cm.).

Image Source: OnlineMath4All.com