Question

Circumference and the area of a circle with radius 5 ft you

Answer 1

The circunference formula is given by

$C=2\pi r$

where r is the radius. Since r measures 5 ft, we have

$\begin{gathered} C=2\pi\cdot5 \\ C=10\pi \end{gathered}$

By taking into account that Pi is 3.14, the circuference is equal to 31.4 ft.

On the other hand, the area formula is given by

$A=\pi r^2$

Then, by substituting r=5 into this formula, we get

$\begin{gathered} A=(3.14)(5^2) \\ A=3.14\times25 \\ A=78.5ft^2 \end{gathered}$

then, the area is equal to 78.5 square feet