Definition:Heptagon
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Definition
A heptagon is a polygon with exactly $7$ sides.
Regular Heptagon
A regular heptagon is a heptagon which is both equilateral and equiangular.
That is, a regular polygon with $7$ sides.
That is, a heptagon in which all the sides are the same length, and all the vertices have the same angle:
Linguistic Note
The word heptagon derives from the Greek hepta, meaning seven, and gon, deriving from the Greek for corner.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): heptagon
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): heptagon
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): heptagon
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): polygon
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): polygon