Q.Write a short note on: Pie diagram

A pie diagram is a circle divided into sectors, each sector representing a part of the total, with the angle of each sector proportional to the value of that part. The angle for a component equals its value divided by the total, multiplied by 360 degrees.

Meaning

A pie diagram, also known as a circle diagram or angular diagram, is a method of presenting statistical data in which a circle is divided into several sectors (slices). Each sector represents one component or part of the total quantity, and the size of each sector shows the relative importance of that component.

How it is drawn

Since the total of all the components is represented by the whole circle, which contains 360 degrees, the angle at the centre for each component is calculated by the formula:

Angle for a component = (Value of the component / Total value) multiplied by 360 degrees.

The circle is then divided into sectors using these angles, and the sectors are usually shaded or coloured differently and labelled.

Uses

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A pie diagram (circle diagram) represents data by dividing a circle into sectors, each sector's angle being proportional to the value of the component it stands for. The angle of each sector is found as (component value divided by total value) multiplied by 360 degrees, and the whole circle represents the total.

Meaning

A pie diagram, also called a circle or angular diagram, is a circular figure used to show how a total quantity is divided among its different parts or components. The whole circle represents the total value, and it is divided into sectors (slices), one for each component.

• The size of each sector, measured by its central angle, is made proportional to the value of the component it represents.
• The angle of a sector = (value of the component / total value) multiplied by 360 degrees, since a full circle has 360 degrees.
• Different sectors are shaded or coloured differently and labelled with the component and its percentage share. …

A pie diagram is a circle divided into sectors whose areas (angles) are proportional to the component values of a total. The angle for each component = (component value ÷ total value) × 360 degrees. It is used to show how a total is divided among its parts.

Meaning

A pie diagram (also called a circular diagram) is a way of presenting data in which a circle is divided into several sectors or slices, each sector standing for a component part of the total.

The angle of each sector is made proportional to the value of the component it represents, so that the whole circle (360 degrees) represents the total. The angle for any component is calculated as:

Angle of a component = (Value of the component / Total value) × 360 degrees.

…

A simple bar diagram is a one-dimensional diagram of bars of equal width placed on a common base, whose lengths are proportional to the values they represent. It is used to present a single series of data, such as one variable over time or across categories.

Meaning

A simple bar diagram is a one-dimensional diagram used to represent a single set (series) of data. It consists of a number of bars (rectangles) of equal width, drawn vertically (or horizontally) on a common base line, with equal gaps between them.

Key features are:

• the width of all bars is kept equal;
• only the length (height) of each bar varies, and it is drawn in proportion to the value it represents;
• the bars are usually arranged in the order of the data (for example, year-wise). …