-
regular heptagon.
Apart from the
heptagonal prism and
heptagonal antiprism, no
convex polyhedron made
entirely out of
regular polygons contains a
heptagon as...
- mathematics, a
heptagonal number is a
figurate number that is
constructed by
combining heptagons with
ascending size. The n-th
heptagonal number is given...
- all
other dots
surrounding the
center dot in
successive heptagonal layers. The
centered heptagonal number for n is
given by the
formula 7 n 2 − 7 n + 2 2...
- In geometry, the
heptagonal prism is a
prism with
heptagonal base. This
polyhedron has 9
faces (2
bases and 7 sides), 21 edges, and 14 vertices. The area...
- of the
regular heptagon. All
heptagonal triangles are
similar (have the same shape), and so they are
collectively known as the
heptagonal triangle. Its...
- geometry, a
heptagonal tiling is a
regular tiling of the
hyperbolic plane. It is
represented by Schläfli
symbol of {7,3},
having three regular heptagons around...
- vertices. A
heptagonal antiprismatic prism or
heptagonal antiduoprism is a
convex uniform 4-polytope. It is
formed as two
parallel heptagonal antiprisms...
- 946, 1222, 1547, 1925 (sequence A002412 in the OEIS). The
first few
heptagonal pyramidal numbers are: 1, 8, 26, 60, 115, 196, 308, 456, 645, 880, 1166...
- Schläfli
symbol of the order-infinite-3
heptagonal honeycomb is {7,∞,3}, with
three infinite-order
heptagonal tilings meeting at each edge. The vertex...
- coin is seven-sided. The
British twenty pence and
fifty pence coins are
heptagonal Reuleaux polygons, as is the
United Arab
Emirates 50 fils coin, the Barbados...
