Question

The circumference of a circle is 40TT what is the radius

Answer 1

The circumference of a circle is given by the following formula:

`c=2\pi r`

From this equation, we can solve for r by dividing both sides by 2π, like this:

`\begin{gathered} (c)/(2\pi)=(2\pi r)/(2\pi) \\ (c)/(2\pi)=(2\pi)/(2\pi)r \\ (c)/(2\pi)=1* r \\ (c)/(2\pi)=r \\ r=(c)/(2\pi) \end{gathered}`

By replacing 40π for c, we get:

`r=(40\pi)/(2\pi)=20`

Then, the radius of the circle equals 20