Pictures from STEM Expo, San Antonio, TX.
Dan Suttin helped galvanize interest around spatial geometry.
His "OCTA TETRA" Museum nearby is a storehouse / warehouse of such exhibits.
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Earth Day 2017
13 hours ago
I use this method for differentiation of the various sizes of phi-scaled tetrahedron:
. . . U6, U3, U, u3, u6 . . .
since volume changes by phi to the 3rd, 6th, 9th power when linearly scaling by up phi.
U3 > U (U=u) > u3 and so on.
The U,V, W tetrahedra are composed of these amounts of lessor sized U, V, W:
U = (2)w3 + (5)u6 + (4)v6 + (2)w6
V = (2)v3 + (3)u3 + (1)w3
W = (2)w3 + (3)v3 + (1)u3
The Fat rhombohedron = (18)W + (6)u3 + (6)v3 + (6)w3
The Thin rhombohedron = (6)W + (12)u3 + (6)v3 + (6)w3
In the meantime, Oregon's education system is starting to go down thetubes in its present format. Liberal moms are out picketing in favor of a casino where the dog track used to be, things have gotten so bad. Are they on strike in Gresham already? [ link ]The argument is the jobs and tax revenue it generates will go to serve the local area.