Question

The radius of a circle is 16 miles. What is the circle's circumference?r = 16 miUse 3.14 for π.

Answer 1

Step-by-step explanation:

The circumference of a circle is equal to

π, which is a number ≈3.14, multiplied by the diameter of the circle.

Therefore, C=πd.

We know that the circumference, C, is 16π, so we can say that:

16π=πd

We can divide both sides by π to see that 16=d.

We now know that the diameter of the circle is 16.

We also know that the diameter has twice the length of the radius.

In equation form: 2r=d

2r=16

r=8

Note that since 2r=d, the equation C=2πr holds and can be used in place of C=πd.

Answer 2

Given:

a.) The radius of a circle is 16 miles.

b.) Use 3.14 for π

For us to be able to determine the circumference of the circle using the radius, we will be using the following formula:

`\text{ Circumference = 2\pi r}`

Where,

r = radius of the circle

We get,

`\text{ Circumference = 2\lparen3.14\rparen\lparen16\rparen = 100.48 miles}`

Therefore, the circumference of the circle is 100.48 miles.