Search: all:new
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BP340 |
| Regular star polygon vs. not so. |
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BP339 |
| Union of left sets is right set vs. intersection of left sets is right set. |
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BP338 |
| High approximate similarity vs. lower approximate similarity. |
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BP337 |
| Black is below upward slopes vs. black is below downward slopes. |
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BP336 |
| Any one gear turns all vs. no gear turns all. |
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CROSSREFS
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See BP536 for all gears can turn.
Adjacent-numbered pages:
BP331 BP332 BP333 BP334 BP335  *  BP337 BP338 BP339 BP340 BP341
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KEYWORD
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nice, stretch, physics, traditional
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CONCEPT
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all (info | search), turn_orientation (info | search), every_other (info | search), gear (info | search), on_line_or_curve (info | search), tracing_line_or_curve (info | search), imagined_motion (info | search), motion (info | search)
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WORLD
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gears [smaller | same | bigger] zoom in left | zoom in right
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AUTHOR
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Aaron David Fairbanks
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BP335 |
| Tessellates the plane vs. does not tessellate the plane. |
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COMMENTS
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EX7152 is an example of a shape than can be stretched in such a way that it no longer tessellates the plane. This is a property that is only exhibited by shapes that tessellate with rotated copies of themselves. - Leo Crabbe, Mar 05 2021 |
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CROSSREFS
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Adjacent-numbered pages:
BP330 BP331 BP332 BP333 BP334  *  BP336 BP337 BP338 BP339 BP340
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KEYWORD
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nice, stretch, unstable, math, hardsort, creativeexamples, proofsrequired, perfect, pixelperfect, traditional
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CONCEPT
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infinite_plane (info | search), tessellation (info | search), tiling (info | search)
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WORLD
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shape [smaller | same | bigger] zoom in left (fill_shape)
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AUTHOR
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Aaron David Fairbanks
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BP334 |
| Odd number of dots vs. even number of dots. |
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CROSSREFS
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See BP334 for a version of the same idea, but using arbitrary shapes instead of dots.
Adjacent-numbered pages:
BP329 BP330 BP331 BP332 BP333  *  BP335 BP336 BP337 BP338 BP339
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KEYWORD
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precise, allsorted, number, math, left-narrow, right-narrow, right-null, help, traditional, preciseworld
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CONCEPT
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even_odd (info | search)
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WORLD
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dots [smaller | same | bigger]
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AUTHOR
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Aaron David Fairbanks
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BP333 |
| Drawing of platonic solid (regular polyhedron) vs. drawing of non-platonic solid. |
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