4.5.4 Pie chart
A pie chart is a circular graph that is divided into slices to represent numerical proportions or percentages.
Each slice in a pie chart represents a portion of the whole, and the size of the slice is proportional to the quantity or percentage of the data it represents.
Pie charts are often used to show the relative sizes or proportions of different categories within a dataset.
They are particularly useful for displaying data in which each category represents a part of a whole, such as a company’s revenue broken down by product line, or the percentage of time spent on different activities throughout the day.
Worked example:
\( 120 \) students choose what they want to do when they leave school.
Their choices are shown in the table.
Complete the pie chart to show this information.
Label each sector clearly.
Calculate the angles at center of the pie chart by dividing the number of students in each choice by the total number of students then multiplying by \( 360° \).
Use a protractor and ruler to construct the pie chart
