When you have a few extra minutes to spend with your bagel in the morning, try out this trick for your kids, or get a kid-friendly knife and let them cut the bagel into two linking pieces on their own:
…you too can have a mathematically correct breakfast. The motion of the knife’s cuts follows a two-twist Möbius strip.
If that’s too easy, you can upgrade your cuts to one of George’s trefoil bagels, which have close infinite surface area for delicious shmear, according to math of course.
Gotta love the internet (and George Hart — father of Vi Hart!) for making math fun and edible!
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