A pie chart can show collected data in sectors. Each sector can be labelled, or can be colour coded with a key. When drawing a pie chart, a protractor will be used to draw the angles accurately.

Today, we update one of our favorite charts, which looks at how orders route ... and how orders are handed by brokers, means each pie actually works quite differently to the others.

In fact, Nokia, Samsung and LG combined sold roughly 400M mobile handsets worldwide in the first half of 2010 with a combined value share of 32% of handset industry profits, while Apple sold roughly ...