# How do you find the central angle of a pie chart for a section of the pie chart that represents 20% of the pie?

##### 1 Answer

Feb 25, 2018

#### Explanation:

In any sector, there are

the arc length,

the sector area

the sector angle

They all represent the SAME fraction of the whole circle.

The arc length is a fraction of the circumference

The sector area is a fraction of the whole area

The sector angle is a fraction of

If the sector is

The sector angle is therefore: