Answers:
[tex]\begin{gathered} \text{Diameter = 22 cm} \\ \text{Circumference = 380.182 cm}^2 \end{gathered}[/tex]
Explanations:
From the circle shown:
Radius, r = 11 cm
Diameter, d = 2 * Radius
d = 2 * 11
d = 22 cm
Diameter = 22 cm
The circulmference of a circle is given by the formula:
[tex]\text{Circumference = }\frac{\Pi d^2}{4}[/tex]
Substitute the value, d = 22 into the equation above: Note that π = 3.142
[tex]\begin{gathered} \text{Circumference = }\frac{\Pi\times22^2\text{ }}{4} \\ \text{Circumference = }\frac{\Pi\times484}{4} \\ \text{Circumference = 121}\Pi cm^2 \\ \text{Circumference = 121 }\times3.142 \\ \text{Circumference = }380.182cm^2 \end{gathered}[/tex]
