It is possible to interpret a pie chart by looking at the proportions of the sectors. The angles can be used to work out what proportion of the whole population a pie chart sector represents.

Pie charts should be converted into accessible tables. It is not necessary to describe the visual attributes of the charts, e.g., red wedge, blue lines, etc., unless there is an explicit need such as ...

His own work includes maps that illustrate the deaths ... Playfair, who is said to have invented the pie chart, includes moments such as “Rome founded”, “Mahomet’s Flight”, and ...

Pie charts are a great way to present numerical data because they make comparing the magnitude of various numbers quick and easy, while also making the larger data set appreciable at a glance.