In geometry , a
heptagon is a polygon with seven sides and seven angle s. In a regular
heptagon, in which all sides and all angles are
Kaynak: HeptagonA
heptagonal number is a figurate number that represents a
heptagon . The n-th
heptagonal number is given by the formula : frac 5n^2 - 3
Kaynak: Heptagonal numberThe most commonly used of these is the Reuleaux
heptagon, which is the shape of several coins: Botswana pula coins in the denominations
Kaynak: Reuleaux triangleA centered
heptagonal number is a centered figurate number that represents a
heptagon with a dot in the center and all other dots
Kaynak: Centered heptagonal numberIn geometry , the
heptagonal tiling is a regular tiling of the hyperbolic plane . 7,3, having three regular
heptagon s around each vertex.
Kaynak: Heptagonal tilingIn geometry , the order-3 snub
heptagonal tiling is a semiregular tiling of the hyperbolic plane. triangle s, one
heptagon on each vertex .
Kaynak: Snub heptagonal tilingIn general, a heptagram is any self-intersecting
heptagon (7-sided polygon ). There are two regular heptagrams, labeled as 7/2 and 7/3,
Kaynak: HeptagramThere are two hexagon s and one
heptagon on each vertex , forming a pattern similar to a conventional soccer ball (truncated icosahedron
Kaynak: Truncated order-7 triangular tilingFor example, a regular pentagon is constructible with compass and straightedge while a regular
heptagon is not. Conditions for
Kaynak: Constructible polygon