Pie Chart Tutorial

A pie-chart gives a clear visual impression of the size of a set of data inside a circle. Since each section of data is clearly marked in a distinct colour, it is a powerful way of showing the size of data.

E.g. Suppose that the marks obtained by a student in a school test is as follows:

Subject Marks
Maths 70
Physics 60
Economics 40
IT 50
Geography 20


Enter the above values and click the Draw button.


Now, in order to explain the data in the pie chart, we can use the following simple procedure:

The total of marks is 240.
240 marks 3600
1 mark 360 /240 = 1.5 0

Based on this, the size of pie for each subject , in proportion to each mark, is as follows:

Subject Size of the Pie in degrees
Maths 105
Physics 90
Economics 60
IT 75
Geography 30

You can see that the angles in the table tally the relative size of each slice.

After learning the given example, you can enter your own values into the table that is next to the pie chart and experiment with it.






Resources at Fingertips

This is a vast collection of tutorials, covering the syllabuses of GCSE, iGCSE, A-level and even at undergraduate level. They are organized according to these specific levels.
The major categories are for core mathematics, statistics, mechanics and trigonometry. Under each category, the tutorials are grouped according to the academic level.
This is also an opportunity to pay tribute to the intellectual giants like Newton, Pythagoras and Leibniz, who came up with lots of concepts in maths that we take for granted today - by using them to serve mankind.


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Recommended Reading


Maths is challenging; so is finding the right book. K A Stroud, in this book, cleverly managed to make all the major topics crystal clear with plenty of examples; popularity of the book speak for itself - 7th edition in print.

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