Question

solve the missing element for each problem. Use 3.14 for 兀.

Answer 1

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

i) To find the radius, we have:

$\begin{gathered} R=\frac{1}{2}\text{ of diameter} \\ R=\frac{1}{2}\times22 \\ R=11\operatorname{cm} \end{gathered}$

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\times3.14\times11 \\ C=69.08\operatorname{cm} \end{gathered}$

iii) To find the area, we have:

$\begin{gathered} A=\pi r^2 \\ A=3.14\times11^2 \\ A=3.14\times121 \\ A=379.94\operatorname{cm}^2 \end{gathered}$