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A pie chart is made by first drawing a circle on the graph n the with the help of a protractor u need to mark the required angles n join the lines correspondingly............hope i helped u:)

e.g the pie chart is for 200 results and the section you are looking for is 30. You do 30 / 200 = 0.15

Then to find the angle you do: 0.15 * 360 (amount of angles in a pie chart) = 54 degrees.

● Various observations of the data are represented by the sectors of the circle.

● The total angle formed at the centre is 360°.

● The whole circle represents the sum of the values of all the components.

● The angle at the centre corresponding to the particular observation component is given by value of the component/total value × 360

● If the values of observation/components are expressed in percentage, then the centre angle corresponding to particular observation/component is given by percentage value of component/100 ×360

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.