Although I wasn't referring to your projects, but to the topic of
rulers, I have done several projects for which I don't remember using
any measuing or marking, but just sort of free-handing it as you go. I
think there ar many times when you need a thing, but have no parameters
or requirement the size of any part of it.
There's a bit of freedom and catharsis in it.
"Playing is not something I do at night, it's my function in life"
That's why I suggested getting a sashigane marked with for
shaku/sun/bu to begin with. Once you get used to it, it has the
markings on the back side for laying out this kind of stuff without a
lot of fuss.
Wrong. I asked for a proof, and that's exactly what I wanted. Didn't
have to be a "2-column" proof, nor a particularly rigorous one, but I
wanted a step-by-step proof, not just another redundant demonstration.
Please don't make assumptions like this. You're not a very good mind-reader.
 Having run across this term repeatedly while searching for geometry
stuff on the web, it seems this has nothing whatever to do with formal
mathematics, but is just the latest fashion for educator's preferred
format for making schoolkids do geometry proofs.
Found--the gene that causes belief in genetic determinism
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