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en.wikipedia.org/wiki/Circle_graph

In graph theory, a circle graph is the intersection graph of a set of chords of a circle. That is, it is an undirected graph whose vertices can be associated with ...

www.mathplanet.com/education/pre-algebra/introducing-geometry/circle-graphs

A part of a circle is called an arc and an arc is named according to its angle. A circle graph, or a pie chart, is used to visualize information and data. A circle graph ...

www.mathsisfun.com/data/pie-charts.html

You can show the data by this Pie Chart: Pie Chart Example. It is a really good way to show relative sizes: it is easy to see which movie types are most liked, and  ...

nces.ed.gov/nceskids/graphing/classic/pie.asp

Pie Chart. There are all kinds of charts and graphs, some are easy to understand while others can be pretty tricky. There are so many different types because ...

www.mathplayground.com/piechart.html

Represent data with a circle graph or pie chart at MathPlayground.com!

Reading pie graphs (circle graphs). AboutTranscript. Reading Pie Graphs (Circle Graphs). Created by Sal Khan, Monterey Institute for Technology and ...