Britannica Sources used in this answer

How does a pie chart represent the sizes of categories?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

A pie chart, also known as a circle graph, represents the sizes of categories by dividing a circle into segments using radii. These segments illustrate the relative magnitudes or frequencies of the data being presented, with the size of each slice corresponding to its proportion of the whole.1