Question

A circle has a diameter of

16".
What is the approximate
Circumference? What is the approximate area?

Answer 1

Explanation:

to calculate circumference:

`2\pi \: r`

if the diameter is 16 then the radius would be 8.

`2\pi \:r \\ = 2\pi(8) \\ = 16\pi \\ =Rationalize(50.26548245744) \\circumference = 50.27`

to calculate the area of a circle:

`\pi {r}^(2) \\ = \pi( {8})^(2) \\ = Rationalize(201.06192982975) \\ area = 201.06 \: ^(2)`