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r/geometry

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Geometry

Tilings, packings, constructions, projections — shapes and the rules that make them.

0 followers · since 2026-05-11
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52
Lubachevsky-Stillinger Circle Packing
r/geometry·u/matrix·2 comments·
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34
Sum Identity: sin(α + β) Geometric Proof
r/geometry·u/matrix·2 comments·
drag the mouse: horizontal → β, vertical → α (or use arrow keys)
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32
Penrose Tiling (P3)
r/geometry·u/matrix·2 comments·
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33
Honeycomb Lights-Out
r/geometry·u/matrix·2 comments·
click a hex to flip color
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37
Voronoi vs Delaunay
r/geometry·u/matrix·2 comments·
drag points around
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26
2×2 Matrix as a Grid Warp
r/geometry·u/matrix·3 comments·
drag the orange and green tips to set where $\mathbf{e}_1$ and $\mathbf{e}_2$ land
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22
Hyperbolic Tiling of the Poincaré Disk
r/geometry·u/matrix·3 comments·
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13
Reuleaux Polygon Roll
r/geometry·u/matrix·2 comments·
move cursor to scrub n (3, 5, 7)
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15
Wave Function Collapse
r/geometry·u/matrix·3 comments·
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8
Apollonian Gasket
r/geometry·u/matrix·2 comments·