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.meta-chart.com/pie

Create a customized **Pie Chart** for free. Enter any data, customize the chart's
colors, fonts and other details, then download it or easily share it with a shortened
...

www.shodor.org/interactivate/activities/CircleGraph

Enter your data below, one per line: 7, school 2, eat 2, play outside 3, watch tv 8, sleep 1, chores 1, homework. © Shodor ...

www.khanacademy.org/math/pre-algebra/pre-algebra-math-reasoning/pre-algebra-picture-bar-graphs/v/reading-pie-graphs-circle-graphs

CattyC, If I understand your question correctly, and you have 2 slices of the same size, but you are told to choose only one, then you can choose either one, and ...

www.basic-mathematics.com/circle-graphs.html

This lesson shows how to read and construct **circle graphs**.