Question

Find the circumference of each circle. Use pie = 22/7 140cm Number 11 on the picture

Answer 1

Number 11:

The question is given below as

The circumference of a circle is calculated using the formula below

`\begin{gathered} C_(circle)=2\pi r \\ r=(D)/(2)=(140cm)/(2)=70cm \\ \pi=(22)/(7) \end{gathered}`

By substituting the values, we will have

`\begin{gathered} C_(c\imaginaryI rcle)=2\pi r \\ C_{c\mathrm{i}rcle}=2*(22)/(7)*70cm \\ C_{c\mathrm{i}rcle}=44*10cm \\ C_{c\mathrm{i}rcle}=440cm \end{gathered}`

Hence,

The circumference of the circle is

`\Rightarrow440cm`