Key Learning Points:
- A complete pie chart represents one (1) whole of the data being measured.
- It can also mean 100% of the data which it is measuring on.
- Like a circle, the complete pie chart will have 360 deg angles in the centre.
- Thus the size of a pie chart slice can be measured by its angle. For example: A 90 degree angle of a slice of pie chart would mean 90/360 = 1/4 (1 quarter).
- Read the questions carefully. They may be asking for actual data figures, fractions, percentages or even ratios.
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