# Mathematics

#### 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.

MathsPhysicsEcon:ITGeography

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.

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.

### Recommended - GCSE & iGCSE

This is the best book available for the new GCSE(9-1) specification and iGCSE: there are plenty of worked examples; a really good collection of problems for practising; every single topic is adequately covered; the topics are organized in a logical order.

### Recommended for A Level

This is the best book that can be recommended for the new A Level - Edexcel board: it covers every single topic in detail;lots of worked examples; ample problems for practising; beautifully and clearly presented.