Question

Crater lake is shaped like a circle with a diameter of about 5.5 miles1.How far is it around the perimeter of Crater lake?2.What is the area of the surface of crater lake?

Answer 1

1.

In order to find the perimeter of the lake, we can use the formula:

`C=\pi d`

Where d is the diameter. Using d = 5.5, we have:

`\begin{gathered} C=3.14\cdot5.5 \\ C=17.27 \end{gathered}`

So the perimeter of the lake is 17.27 miles.

2.

In order to calculate the area of the lake, we can use the formula:

`A=(\pi d^2)/(4)`

So we have:

`A=(3.14\cdot5.5^2)/(4)=23.75`

So the lake's area is 23.75 square miles.