Question

To find the area of a circle, take π x 2 x radius.
true or false

Answer 1

That statement is true, but you do not always need the two.

Let's say that we had a problem, given the radius is 5, and we have to find the diameter.

First step is to define A

`A = \pi r^2`

Second, redefine r as the actual radius to avoid confusion.

`r = 5`

Third, set up an equation with the given values where you are multiplying pi by the radius.

`\pi r^2 = \pi *r^2`

Fourth but not least, get the actual value.

`\pi * r^2 = 79` rounded to nearest whole number