Question

The following is not drawn to scale. Find the area of the circle. (Use 22/7 as an approximation for 1.)21 CMWhat is the area of the circle? Round to one decimal place.Do not include units, cm?, in your answer.

Answer 1

The diameter of the circle is d = 21 cm.

The formula for the area of circle is,

`A=(\pi(d)^2)/(4)`

Determine the area of circle of diameter 21 cm.

`\begin{gathered} A=(\pi(21)^2)/(4) \\ =(22)/(7)\cdot(21)/(4)\cdot21 \\ =11\cdot(3)/(2)\cdot21 \\ =346.5 \end{gathered}`

Thus area of circle is 346.5.