Question

Find the circumference and area of the circle. Express answers in terms of and then round to the nearest tenth. Find the circumference in terms of . C = _

Answer 1

Given the circle with its radius, r;

`r=11cm`

Thus, the circumference, C, of a circle is;

`C=2\pi r`

Then;

`\begin{gathered} C=2\pi(11)cm \\ \\ C=22\pi cm \end{gathered}`

ANSWER:

`C=22.0\pi cm`

Also, the area, A, of the circle is;

`A=\pi r^2`

Then;

`\begin{gathered} A=\pi(11)^2 \\ \\ A=121\pi cm^2 \end{gathered}`

ANSWER:

`A=121.0\pi cm^2`