Question

The circular base of a traditional tepee has a diameter of about 15 feet. Which of the following is the approximate area of the base of the tepee? A. 23.6 square feetB. 47.1 square feetC.176.6 square feetD. 706.5 square feet(I need an explanation)

Answer 1

The area of a circle is given by:

`A=\pi r^2`

where:

`\begin{gathered} r=radius=(d)/(2) \\ d=diameter=15ft \\ so\colon \\ r=(15)/(2) \end{gathered}`
`\begin{gathered} A=\pi((15)/(2))^2 \\ A=(225)/(4)\pi \\ A\approx176.6ft^2 \end{gathered}`