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Sector graph Session 1

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Sector graph Circle graph Pie chart Use sectors of a circle to show sizes of parts

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Why circle graph/pie chart? The circle provides a visual concept of the whole (100%). Circle graphs/pie charts are simple to use.

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Sector graphs are used when there are no more than six components only—otherwise, the resulting picture will be too complex to understand.

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Title Sectors Six types of sports are shown on the sector graph Key Graph Title – the title tells what the graph is representing. Sectors – Each sector is one part of the whole circle. It represents a particular category. Sector Labels – Each label tells what the sector represents. Labels 20% Percentage Sector graph or pie chart Sector graphs are used when there are no more than six components.

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Calculate the angle size

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A group of 70 students was surveyed to find the group’s favourite sport. The results are shown below: Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014

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Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose Australian football Total number of people surveyed Calculate the angle size

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Calculate the angle size for cricket: Write the number of people who chose the the first sport on top Divide by 80 ( the total number of people surveyed Times by 360 ( revolution). Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose cricket Total number of people surveyed

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Calculate the angle size for Motor Racing Write the number of people who chose the the first sport on top Divide by 80 ( the total number of people surveyed Times by 360 ( revolution). Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose cricket Total number of people surveyed

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Calculate the angle size for Rugby League Write the number of people who chose Rugby League on top (numerator) Divide by 80 ( the total number of people surveyed) (denominator) Times by 360 ( revolution). Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose cricket Total number of people surveyed

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Calculate the angle size for Rugby Union Write the number of people who chose Rugby Union on top Divide by 80 ( the total number of people surveyed) Times by 360 ( degrees in a revolution). Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose cricket Total number of people surveyed

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Calculate the angle size for Soccer Write the number of people who chose soccer on top Divide by 80 ( the total number of people surveyed) Times by 360 ( degrees in a revolution). Favourite sport Australian football CricketMotor racing Rugby League Rugby Union Soccer Number of viewers 13168191014 Number of people who chose cricket Total number of people surveyed

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By: Zani Alam

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