Simplified Sprues v4 which print effectively at any scale.
thingiverse
These sprues are like my v3 sprues but with the vertical pins replaced with more cylindrical holes. They're easier to use for teaching planar geometries but no longer appropriate for 3D geometries. They tend to print more reliably than the v3 sprues, which are really hit-or-miss depending on how well dialed-in your printer is. Instructions from scratch, with input from the five teachers who work with me on Geometry this year.
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