Polygon
Presentation
By: Team Math

Resource Page
Polygon names
Name Sides triangle (or trigon) quadrilateral (or tetragon) pentagon hexagon heptagon (avoid "septagon") 7 octagon enneagon (or "nonagon") decagon
8
9
10
3
4
5
6 tables found on wikepedia under polygons

Resource Page hendecagon (avoid "undecagon") 11 dodecagon (avoid "duodecagon") 12 triskaidecagon pentadecagon heptadecagon enneadecagon icosagon triacontagon pentacontagon
20
30
50
13
15
17
19 hectagon (avoid "centagon") 100 chiliagon myriagon
1000
10,000

Resource Page and
Tens
Ones final prefix
1 hena-
20 icosi-
30 triaconta-
2 -di-
3 -tri-
40 tetraconta-
50 pentaconta-
60 hexaconta-
70 heptaconta-
80 octaconta-
90 enneaconta-
-kai-
4 -tetra-
5 -penta-
6 -hexa-
7 -hepta-
8 -octa-
9 -ennea-
-gon
That is, a 42-sided figure would be named as follows:
Tens and Ones final pre fix full polygon name tetraconta-kai-di-gon tetracontakaidigon and a 50-sided figure
Tens pentacontaand Ones final prefi x
-gon full polygon name pentacontagon

Types of Polygons
 Regular Polygons
 Triangles
 Quadrilaterals
 Pentagons
 Hexagons
 Octagons
 Decagons

Regular Polygons
• All of the sides and the angles are congruent

Triangles
• Three sided polygons

Quadrilaterals
• Four sided polygons

Pentagons
• Five sided polygons

Hexagons
• Six sided polygons

Octagons
• Eight sided polygons

Decagons
• Ten sided polygons

2
Name the following polygons.
1
3

• 1 – HEXAGON
• 2 – QUADRILATERAL
• RECTANGLE
• 3 - DECAGON

Name the following polygons.
1
2
3

• 1 – Octagon
• 2 – Pentagon
• 3 – Scalene Triangle

What polygons can you find…
• In your classroom?
• On the playground?
• In your own home?