a pie chart, an interpretive dance if you're into that sort of thing. But one fun way to present information is through a Venn diagram, which tells you the ways in which things are different and ...

Pie charts are drawn as a circle representing all the data given. The 360 degrees about the centre of the circle is divided up according to the proportions of the different quantities shown.

Each circle on one graph corresponds to a circle ... make two initially identical graphs look very different by shifting the balls around (see diagram). The graph isomorphism problem requires ...