from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A polygon having seven sides.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A polygon with seven sides and seven angles.
from the GNU version of the Collaborative International Dictionary of English
- n. A plane figure consisting of seven sides and having seven angles.
from The Century Dictionary and Cyclopedia
- n. In geometry, a closed figure having seven angles successively united by lines.
- n. In fort, a place that has seven bastions for defense.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a seven-sided polygon
It is seven-sided, a heptagon, composed of an infinitely recursive single line.
Euclid was able to draw an equilateral triangle, square, pentagon and hexagon, but recall that the heptagon (which has seven sides) and the nonagon (nine) eluded him.
The heptagon seven sides, for example, cannot be constructed with a compass and straightedge.
If the model proves to be successful, the two countries will extend the agreement to a larger area, gradually, and chose the extended area based on experiences accumulated in exploring and exploiting this heptagon.
The 7 coordinates for the corners of the heptagon are
Upon which the same disorder, confusion, and error follow, as would if a man, going to demonstrate something of an heptagon, should, in the diagram he took to do it, leave out one of the angles, or by oversight make the figure with one angle more than the name ordinarily imported, or he intended it should when at first he thought of his demonstration.
Its basis or groundwork was of most pure and limpid alabaster, and its height somewhat more than three spans, being a regular heptagon on the outside, with its stylobates or footsteps, arulets, cymasults or blunt tops, and Doric undulations about it.
Later experience enabled men to judge what was or was not really conducive to virtue, and they rejected both the flute and several other old-fashioned instruments, such as the Lydian harp, the many-stringed lyre, the ‘heptagon,’
Here were seven cities, forming the apices of a great heptagon; and at the very center was Festival Field, where drones took place.
The side of a regular heptagon is equal to half the side of an equilateral triangle inscribed in the same circle.