Today, we update one of our favorite charts ... pie actually works quite differently to the others. The rules and conventions for trading across each of the three pies are quite different, too. 1.

Bus = 3 × 20 = 60. These angles should add up to 360°. If they do not add up to 360°, something is incorrect. Image caption, To plot the pie chart ... in a draw = 1/4 × 24 = 6 games.