Question

How do you find the circumference and area of a circle with radius of 7 feet?

Answer 1

The formula for area is `pi xx r^2` and the circumference is `2 xx pi xx r`

So if `r=7`, let's find these values:

`* * * * * * * * * * * * * * * * * *`

Area

`pi xx 7^2`

`pi xx 49`

`49pi` feet

`* * * * * * * * * * * * * * * * * *`
Circumference

`2 xx pi xx 7`

`14pi` feet

Answer 2

Use these formulae

Explanation:

The circumference of a circle is `pi d`

The area of a circle is `pi r^2`

Remember that the diameter is double the radius