Definitions [1]
A Pictograph is a chart that uses pictures or symbols to represent data. Each picture stands for a specific number of items, making the data easy to understand at a glance.
Formulae [1]
Formula: Central Angle
\[\text{Central angle}=\frac{\text{Value of component}}{\text{Total value}}\times360^\circ\]
Key Points
Key Points: Pie Diagram
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A pie diagram represents data using a circle.
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The whole circle = total data = 360°.
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Each part of the data is shown by a sector.
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The central angle of a sector is proportional to the data value.
- Larger value → larger sector, smaller value → smaller sector.
