Pie charts: Sectional percentage and degree mapping A pie chart is a graphical representation of the relative proportions of different parts of a whole. The...
Pie charts: Sectional percentage and degree mapping
A pie chart is a graphical representation of the relative proportions of different parts of a whole. The total area of the pie chart represents 100%, and the sections are divided into equal parts, each representing a different percentage.
The circumference of the pie chart is equal to 360 degrees. Therefore, the angle of each sector is equal to 360 degrees divided by the number of sectors.
Sectional Percentage
The sectional percentage is the proportion of the total area of the pie chart that each sector represents. It can be calculated by dividing the area of each sector by the total area of the pie chart and multiplying by 100.
Degree Mapping
In addition to using percentage, another common way to map data to a pie chart is to use degrees. Degrees are measured in a clockwise direction, and the angle of a sector is calculated by multiplying the arc length of the sector by the radius of the pie chart