-
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...
-
separated by a
strip of triangles. In the case of the
heptagonal antiprism, the caps are two
regular heptagons. As a result, this
polyhedron has 14 vertices,...
- the
heptagonal tiling is a
regular tiling of the
hyperbolic plane. It is
represented by Schläfli
symbol of {7,3},
having three regular heptagons around...
- 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...
- Gea
heptagon is a
species of orb
weaver spiders in the
family Araneidae. It is
found in
Pacific islands and Australia, and has been
introduced into the...
- the
stamp folding problem for a
strip of
seven stamps. 115 is also a
heptagonal pyramidal number. The 115th
Woodall number, 115 ⋅ 2 115 − 1 = 4 776 913...
- of the
regular heptagon. All
heptagonal triangles are
similar (have the same shape), and so they are
collectively known as the
heptagonal triangle. Its...
- 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...
