Question

Find the length of the radius if the circumference is 15.7 feet

Answer 1

The circumference of a circle can be calculated by using this formula:

`C=2\pi r`

Where "r" is the radius of the circle.

In this case, you know that:

`\begin{gathered} C=15.7ft \\ \pi\approx3.14 \end{gathered}`

Then, you can substitute values into the formula and solve for "r":

`\begin{gathered} 15.7ft=(2)(3.14)r \\ \\ (15.7ft)/((2)(3.14))=r \end{gathered}`
`\begin{gathered} (15.7ft)/(6.28)=r \\ \\ r=2.5 \end{gathered}`

Hence, the answer is:

`2.5\text{ }feet`