Definition

Noun: A pie chart is a circular statistical graphic that is divided into slices (or sectors) to illustrate numerical proportions. Each slice's arc length (and consequently its central angle and area) is proportional to the quantity it represents. It is used to show the relative sizes of parts that make up a whole.

Usage

A pie chart is used to visualize the composition of a single whole unit, showing what percentage or fraction each category contributes to the total. It is most effective when there are a limited number of categories (typically fewer than seven) and when the differences in proportions are clear.

Examples

• The pie chart clearly showed that 40% of the company's budget was spent on marketing.
• She created a pie chart to display the survey results on favorite fruit preferences.
• The report included a pie chart breaking down the sources of renewable energy generation.

Advanced Usage

• Exploded Pie Chart: A variation where one or more slices are separated from the rest of the chart to emphasize them.
  • The exploded pie chart highlighted the largest expense category.
• Doughnut Chart: A similar chart with a hollow center, which can sometimes allow for the display of additional information in the middle.
  • While similar to a pie chart, a doughnut chart can be visually less cluttered.

Variants and Related Words

• Chart (n.): A sheet of information in the form of a table, graph, or diagram.
• Graph (n.): A diagram showing the relation between variable quantities.
• Sector (n.): In the context of a pie chart, this refers to one of the triangular slices.
• Proportion (n.): A part, share, or number considered in comparative relation to a whole.

Synonyms

• Circle graph
• Proportional circle chart

Related Phrases/Idioms

• A slice of the pie: An idiomatic expression meaning a share or portion of something, especially money or benefits. This idiom is conceptually related to the visual metaphor of a pie chart.
  • Every department wants a larger slice of the pie in the annual budget.

Noun

1. a circular chart divided into triangular areas proportional to the percentages of the whole