In graph theory, a circle graph is the intersection graph of a set of chords of a circle. It is an undirected graph whose vertices can be associated with chords of a circle such that two vertices are adjacent if and only if the corresponding chords cross each other. The circle graph is also called pi graph and pi chart.
Some important formulas of circle graph are given below:
1. Percentages = (Amount in the Category ⁄ Total) × 100
2. Angle = (Amount in the Category ⁄ Total) × 360°
Example 1: A fruit basket is filled with 36% Apples, 29% Bananas, 9% Mangoes, 7% Pineapples and 19% Grapes. Prepare a circle graph chart as per the data provided.