Save guides, add subjects and pick up where you left off with your BBC account. A pie chart can show collected data in sectors. Each sector can be labelled, or can be colour coded with a key.

Playfair, who is said to have invented the pie chart, includes moments such as “Rome founded”, “Mahomet’s Flight”, and “America discovered”. He never mentions slavery. With such a ...

Each Saturday, Opinion columnist Philip Bump makes and breaks down charts explaining the latest in economics, pop culture, politics and more. “Imagine a pie chart that shows Visuals at 42 ...

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.

Save guides, add subjects and pick up where you left off with your BBC account. The circle of the pie chart represents the whole. That's a full 360 degrees. Each part, or slice, represents part of ...