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In honor of National Pi Day, here are nine amazing pie charts

It wouldn't be National Pi Day at Wonkblog without some pie charts to mark the momentous occasion.

The versatile chart can be used in all sorts of situations. Like to figure out how much pie one has eaten.

Or to represent one's favorite video game character.

Pie charts are used with surprising frequency to understand musical lyrics.

While pie charts appear to be simple, sometimes they can go wrong.

Really, really wrong.

And, if you love pie charts just a bit too much, you might end up in need of a pie chart intervention.

Happy Pi Day!