heptagon

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Related to heptagonal: Heptagonal numbers

heptagon

a polygon having seven sides

Heptagon

A seven-sided regular polygon; the angle included between the seven sides is 128.6 degrees.

heptagon

[′hep·tə‚gän]
(mathematics)
A seven-sided polygon.
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References in periodicals archive ?
It reveals a new method of generating dual frequency by using heptagonal slot and triangular patches in the structure.
Covalent bonding of six carbon atoms at the vertices of a hexagon observed in sheet structure of graphene was found to be responsible for forming a variety of structures like--seamless multi and single walled tubular (nanotubes), spherical cagey (fullerenes) and branching tubules when combined with additional pentagonal and heptagonal arrangements.
Plate la is heptagonal and 2a is hexagonal, the former being the largest epithecal plate and about twice as large as the latter.
It was history-making for another reason too - it was, according to the DCB, the only heptagonal coin in circulation in the world.
The building's unique heptagonal structure contributes dynamic angles and multiple exposures, offering exceptional light and views.
The compact old part of town was built in the late Medieval era with two city gateways, a councilhouse with one of the oldest indoor-theatres of central Switzerland, and three heptagonal fountains with bronze figures of more recent date.
By overlapping different numbers of sections, the students created regular pyramids with different bases: triangular, rectangular, pentagonal, hexagonal, and heptagonal (see fig.