-
contains a
heptagon as a face. Two
kinds of star
heptagons (heptagrams) can be
constructed from
regular heptagons,
labeled by Schläfli
symbols {7/2}, and {7/3}...
- 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...
- A
heptagonal number is a
figurate number that is
constructed by
combining heptagons with
ascending size. The n-th
heptagonal number is
given by the formula...
- 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...
-
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,...
- geometry, a
heptagonal triangle is an obtuse,
scalene triangle whose vertices coincide with the first, second, and
fourth vertices of a
regular heptagon (from...
- A
centered heptagonal number is a
centered figurate number that
represents a
heptagon with a dot in the
center and all
other dots
surrounding the center...
-
twists in the arms of the tetrahedron;
while others have 24
heptagons –
these heptagons can be
taken to be planar,
though non-convex, and the models...
-
Figurate numbers representing heptagons are
called heptagonal numbers. 7 is also a
centered hexagonal number. A
heptagon in
Euclidean space is
unable to...
