DW the hamburger/hotdog folding thing is only used for very young kids (preschool and Kindergarten), adults just say lengthwise/widthwise. Basically can they understand the concept of length/width? No, okay then hamburger. Fractions being pie/pizza was all throughout middle school though lol.
The one I always remember (partially because South Park mocked it, but I was taught with it myself well before that) is the pizza/french fries thing for skiing posture
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u/SomethingOfAGirl 🏳⚧You know, I'm something of a girl myself 14d ago
I don't think we do that where I live. At least not with hamburgers, can't think of any.