Question

The diameter of a semicircle is 6 miles. What is the semicircle's perimeter?

Answer 1

`15.42mi`

Explanation:

Use the formula for a semicircle's perimeter.

`P=(1)/(2)\pi *d+d`

Plug in 6 for d.

`P=(1)/(2)\pi*6+6`

Let's use 3.14 for
`\pi`, just to make it easier, but of course, if it states to round it to something else, just plug in that many values for
`\pi`.

`P=(1)/(2)(3.14)*6+6 \\ \\ P=1.57*6+6 \\ \\ P=9.42+6 \\ \\ P=15.42`

Answer 2

Explanation:

The perimeter = pi * d + d

d = 6 miles

The perimeter = pi*6 + 6 This is one possible answer

perimeter = 6*3.14 + 6

perimeter = 18.84 + 6

perimeter = 24.84 Which is another possibility

If you have choices, please list them.