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Circle Graph Or Pie Chart - Drawing Pie Charts

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The favourite flavours of ice-creams for students of a school is given in percentages as follows. 

Flavours  Percentage of students Preferring the flavours
Chocolate 50 %
Vanilla  25 %
Other flavours 25 %

Let us represent this data in a pie chart.
The total angle at the centre of a circle is 360°. The central angle of the sectors will be a fraction of  360°. We make a table to find the central angle of the sectors .

Flavours students in preferring the flavours  In fractions Fraction of 360° 
Chocolate 50 % `50/100 = 1/2` `1/2` of 360° = 180° 
Vanilla  25 % `25/100 = 1/4` `1/4` of 360° = 90°  
Other flavours 25 % `25/100 = 1/4` `1/4` of 360° =90° 

1. Draw a circle with any convenient radius. Mark its centre (O) and a radius (OA). (fig.)

2. The angle of the sector for chocolate is 180°. Use the protractor to draw ∠AOB = 180°. (fig.)

3. Continue marking the remaining sectors.

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Drawing Pie Charts 1 [00:26:29]
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