Polygon Triangulations
There are 2 triangulations for a square, 5 for a pentagon, 14 for a hexagon, 42 for a heptagon, and 132 for an octagon. The numbers 2, 5, 14, 42, 132, ..., are the Catalan numbers.
Contributed by:
Ed Pegg Jr
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Polygon Triangulations
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http://demonstrations.wolfram.com/PolygonTriangulations/
Contributed by:
Ed Pegg Jr
Combinatorics
Graph Theory
High School Geometry
Tiling
Triangles
Delannoy Number Carpet
Diagonal Planes of a Cube
Diagonals of Polyhedra
A 2-pire Map
Pinwheel Tiling
Proportional Triangle Nesting
Spanning Tree of Points on Sphere
Lattice Rule
Delannoy Path Exhaustion Diagonal
Ramsey(3,3,3)>16
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