1. Pie Chart 1: How to draw a pie chart S. Kelleher

2. Fraction of a circle = number of people in a category total number of people in the survey  3600

3. Genre Sport Sci-fi Drama Documentary Frequency 29 25 10 8
EXAMPLE
72 People were surveyed about which type of T.V. programme was their favourite. The results were:
Genre Sport Sci-fi Drama Documentary
Frequency
Draw a pie-chart for the information in the table above
TYPE/CATEGORY
HOW OFTEN

4. Calculating the angles
Fraction of a circle = number of people in a category total number of people in the survey  3600
SPORT =  = 1450
CATEGORY TOTAL
SURVEY TOTAL
SCI-FI =  = 1250
NOTE: When doing calculations round to the nearest whole number of degrees
DRAMA =  = 500
DOCUMENTARY =  = 400
CHECK: Total = 3600

5. Drawing the angles
IGNORE THIS PART OF THE PROTRACTOR WHEN TAKING MEASUREMENTS OR DRAWING CIRLCES

6. ⑤ Spin the protractor around
⑥ Draw the bottom half of the circle
④ Trace the protractor outline
③ Sit the protractor on the cross-hair
② Draw a horizontal line from the cross-hair
① Draw a cross-hair

7. ⑧ Draw a line from the cross-hair to the mark
⑦ Sit the protractor on the cross-hair and mark the first angle: 1450

8. ⑨ Spin the protractor around until it matches up with the line you drew for the first angle.
⑪ Draw a line between the cross-hair and the mark.
⑩ Mark the next angle by counting from the first line you have drawn. Angle = 1250

9. ⑫ Spin the protractor around until it matches up with the second line
⑭ Draw a line from the cross-hair to the mark.
⑬ Count from this line and place a mark for the next angle. Angle = 500

10. ⑮ The final angle is automatically drawn, so only labels need to be added.
SPORT
1450
1250
400
DOCUMENTARY
SCI-FI
500
DRAMA