Question

Draw a pie chart showing the following information. The table shows the colours preferred by a group of people.

Colours	Number of people
Blue	$18$
Green	$9$
Red	$6$
Yellow	$3$
Total	$36$

Find the proportion of each sector.

For example, Blue is $\frac{18}{36}=\frac{1}{2}$; Green is $\frac{9}{36}=\frac{1}{4}$ and so on.

Use this to find the corresponding angles.

Answer 1

Central angle: Blue $\Rightarrow \frac{18}{36}\times {360}^o$$={180}^o$

Green $\Rightarrow \frac{9}{360}\times {360}^o$$={90}^o$

Red $\Rightarrow \frac{6}{36}\times {360}^o$$={60}^o$

Yellow $\Rightarrow \frac{3}{36}\times {360}^o$$={30}^o$