Pie Chart or Circle Graph

Statistical data can also be presented in the form of a pie chart (or circle graph). It shows the relationship between a whole and its part. Here, a circle is divided into various sectors, in proportion with the various component parts of the total.

The following pie chart represents the expenditure (in percentage) on various items and savings of a family during a month.

Steps for the construction of a pie chart |

**Step 1: **Take the total value of all the items equal to 360°. |

**Step 2: **Convert all components of the data into degrees using the following formula:
Degree of any component = |

**Step 3: **Draw a circle of appropriate radius. |

**Step 4: **Draw any radius (preferable horizontal). With this radius as base line, draw an angle at the center equal to the degree represented by the first component. This angular ray will touch the circumference of the circle. In the same way, construct a second sector and other sectors one after the other using the same procedure. |

**Step 5: **Different sectors representing various component parts should be distinguished from one another by using different shades. |