To quit creating polygons, press Esc, click another command, or click Done in the Polygon dialog box
Name
Edges
Remarks
henagon (or monogon)
1
In the Euclidean plane, degenerates to a closed curve with a single vertex point on it.
digon
2
In the Euclidean plane, degenerates to a closed curve with two vertex points on it.
triangle (or trigon)
3
The simplest polygon which can exist in the Euclidean plane.
quadrilateral (or quadrangle or tetragon)
4
The simplest polygon which can cross itself.
pentagon
5
The simplest polygon which can exist as a regular star. A star pentagon is known as a pentagram or pentacle.
hexagon
6
heptagon
7
avoid “septagon” = Latin [sept-] + Greek
octagon
8
enneagon (or nonagon)
9
decagon
10
hendecagon
11
avoid “undecagon” = Latin [un-] + Greek
dodecagon
12
avoid “duodecagon” = Latin [duo-] + Greek
tridecagon (or triskaidecagon)
13
tetradecagon (or tetrakaidecagon)
14
pentadecagon (or quindecagon or pentakaidecagon)
15
hexadecagon (or hexakaidecagon)
16
heptadecagon (or heptakaidecagon)
17
octadecagon (or octakaidecagon)
18
enneadecagon (or enneakaidecagon or nonadecagon)
19
icosagon
20
No established English name
100
“hectogon” is the Greek name (see hectometre), “centagon” is a Latin-Greek hybrid; neither is widely attested.
chiliagon
1000
Pronounced /?k?li???n/), this polygon has 1000 sides. The measure of each angle in a regular chiliagon is 179.64°.René Descartes used the chiliagon and myriagon (see below) as examples in his Sixth meditation to demonstrate a distinction which he made between pure intellection and imagination. He cannot imagine all thousand sides [of the chiliagon], as he can for a triangle. However, he clearly understands what a chiliagon is, just as he understands what a triangle is, and he is able to distinguish it from a myriagon. Thus, he claims, the intellect is not dependent on imagination.
myriagon
10,000
See remarks on the chiliagon.
megagon
1,000,000
The internal angle of a regular megagon is 179.99964 degrees.
To construct the name of a polygon with more than 20 and less than 100 edges, combine the prefixes as follows
Tens
and
Ones
final suffix
-kai-
1
-hena-
-gon
20
icosi-
2
-di-
30
triaconta-
3
-tri-
40
tetraconta-
4
-tetra-
50
pentaconta-
5
-penta-
60
hexaconta-
6
-hexa-
70
heptaconta-
7
-hepta-
80
octaconta-
8
-octa-
90
enneaconta-
9
-ennea-
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