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What is meant by pie diagram ? Explain the method of its construction. |
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Answer» A Pie Chart is a type of graph that displays data in a circular graph. The pieces of the graph are proportional to the fraction of the whole in each category. In other words, each slice of the pie is relative to the size of that category in the group as a whole. In this : 1) Various observations of the data are represented by the sectors of the circle. 2) The total angle formed at the centre is 360°. 3) The whole circle represents the sum of the values of all the components. 4) The angle at the centre corresponding to the particular observation component is given by(Value of Component divided by total value) multiplied by 360 degree. Steps of construction of pie chart for a given data: ● Find the central angle for each component using the formula given on the previous page. ● Draw a circle of any radius. ● Draw a horizontal radius ● Starting with the horizontal radius, draw radii, making central angles corresponding to the values of respective components. ● Repeat the process for all the components of the given data. ● These radii divide the whole circle into various sectors. ● Now, shade the sectors with different colours to denote various components. ● Thus, we obtain the required pie chart. |
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