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

Solution:

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:

$A=121.0\pi cm^2$