Question

Number 25. Identify the diameter of the circle. Then find the circumference.

Answer 1

Answers:

`\begin{gathered} \text{Diameter = 22 cm} \\ \text{Circumference = 380.182 cm}^2 \end{gathered}`

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:

`\text{Circumference = }(\Pi d^2)/(4)`

Substitute the value, d = 22 into the equation above: Note that π = 3.142

`\begin{gathered} \text{Circumference = }\frac{\Pi*22^2\text{ }}{4} \\ \text{Circumference = }(\Pi*484)/(4) \\ \text{Circumference = 121}\Pi cm^2 \\ \text{Circumference = 121 }*3.142 \\ \text{Circumference = }380.182cm^2 \end{gathered}`