Question

find the radius and circumference of the circle below d = 36 ft

Answer 1

Radius of a circle is half the diameter:

Then, radius of the circle would be:

$\begin{gathered} r=\frac{36}{2} \\ r=18\text{ ft} \end{gathered}$

Circumference of a circle is represented by the following expression:

$\begin{gathered} C=\pi\cdot d\text{ } \\ \text{where,} \\ \pi=3.1416 \\ d=\text{diameter} \end{gathered}$

Then, substitute the given values and solve for the circumference:

$\begin{gathered} C=3.1416\cdot36 \\ C\approx113.1 \end{gathered}$

Circumference of the circle is 113.1 ft.