Question

If the perimeter of a circle is 21.99 m, what will the diameter be? And the radio?

Answer 1

The circumference (perimeter) of a circle is given as:

$C=\pi D$

Plugging the value given we have that:

$\begin{gathered} 21.99=3.14D \\ D=\frac{21.99}{3.14} \\ D=7.003 \end{gathered}$

Rounding the diameter we have that it is 7 meter. The radius is half the diameter, then the radius is 3.5.

Therefore the diameter is 7 meters and the radius is 3.5 meters.