Heptagon
[Noun]
Webster's Dictionary 1828
1. In geometry, a figure consisting of seven sides and as many angles.
Heptagon
[Noun]
Webster's Dictionary 1913
A plane figure consisting of seven sides and having seven angles.
Having seven angles or sides. heptagonal numbers, in
arithmetic, a sort of
polygonal numbers, wherein the difference of the terms of the corresponding
arithmetical progression is 5. One of the properties of these numbers is, that if they are multiplied by 40, and 9 is added to the product, the sum will be a square number.
Having seven angles or sides.
