Image © 2008 Lucy Pringle
Crop circles are nothing new, but crop circles that depict Pi are interesting indeed:
Yes. And it’s not a close approximation. It’s absolute. It’s very, very clear when you look at the drawing of the sectors that these are digits. These are individual digits with very little error possibility, so the number that comes out are the first ten digits of Pi.
Though provoking to think that a symbol embedded in barley could actually depict Pi so accurately. FYI this is probably not the most effective way to either complete or turn in your math homework.