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AdamExchange · Answer 1 · 2023-01-30T11:25:37+0000

From the question, the given parameter is the diameter, D = 22cm.

i) To find the radius, we have:

$\begin{gathered} R=(1)/(2)\text{ of diameter} \\ R=(1)/(2)*22 \\ R=11\operatorname{cm} \end{gathered}$

ii) To find the Circumference, we have:

$\begin{gathered} C=2\pi r \\ \text{where r is the radius} \end{gathered}$
$\begin{gathered} C=2*3.14*11 \\ C=69.08\operatorname{cm} \end{gathered}$

iii) To find the area, we have:

$\begin{gathered} A=\pi r^2 \\ A=3.14*11^2 \\ A=3.14*121 \\ A=379.94\operatorname{cm}^2 \end{gathered}$