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Re:3D Modeling with Paper by Terr_ on Friday September 12, 2025 @10:13PM (#45228771)
My reading is that it's a convenient near-7 approximation someone developed, like using 22/7 for pi.

Certainly good enough for practical handheld construction purposes, but not geometric-proof-y stuff.

Re:3D Modeling with Paper by srean on Saturday September 13, 2025 @04:13AM (#45230275)
Checkout

    Scimemi, Draw of a regular
    heptagon by folding.
    Proceedings of the 1st
    International Meeting of
    Origami Science and 
    Technology. 1989