Polygon Presentation

By: Elaine Hersh, Anna Oleszczuk, and

Sarah Meder

tables found on wikepedia under

polygons

Resource PagePolygon names

Name Sides

triangle (or trigon) 3

quadrilateral (or tetragon) 4

pentagon 5

hexagon 6

heptagon (avoid "septagon") 7

octagon 8

enneagon (or "nonagon") 9

decagon 10

Resource Page

hendecagon (avoid "undecagon") 11

dodecagon (avoid "duodecagon") 12

triskaidecagon 13

pentadecagon 15

heptadecagon 17

enneadecagon 19

icosagon 20

triacontagon 30

pentacontagon 50

hectagon (avoid "centagon") 100

chiliagon 1000

myriagon 10,000

Resource PageTens

and Ones final prefix

-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-

That is, a 42-sided figure would be named as follows:

Tensand Ones

final prefix

full polygon name

tetraconta- -kai- -di- -gon tetracontakaidigonand a 50-sided figure

Tensand Ones

final prefi

xfull polygon name

pentaconta-   -gon pentacontagon

Types of Polygons

Regular PolygonsTriangles

QuadrilateralsPentagonsHexagonsOctagonsDecagons

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

Name the following polygons.

1

2 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?