This power point may be used by educators to teach students about polygons and polyhedra. It includes the definition of regular polygons, the names of a few common polygons and an introduction to Platonic Archimedes solids.

1. POLYGONS &
POLYHEDRA
By Jenna Lin

2. WHAT IS A POLYGON?
• POLY MEANS
MANY
•GON MEANS
ANGLE

3. THESE ARE POLYGONS

4. THESE ARE NOT POLYGONS

5. POLYGONS
• 2-D Closed Shape
• Made of Line Segments
• No curves
• Line Segments Only
Intersect at the Endpoints

6. REGULAR POLYGONS
• All line segments are congruent
• All angles are congruent.
Regular Polygons
Not Regular Polygons

7. Names of Polygons
# sides # of angles Name of polygon
3 3 triangle or trigon
4 4 quadrilateral or tetragon
5 5 pentagon
6 6 hexagon
7 7 heptagon
8 8 octagon
9 9 nonagon or enneagon
10 10 decagon
11 11 hendecagon
12 12 dodecagon

8. WHAT IS A
POLYHEDRON?

9. POLYHEDRON
A 3-D SHAPE MADE OF
POLYGONS
edge
face
vertex

10. PLATONIC
SOLIDS
or
regular polyhedra
Polyhedra where all
of the faces are
congruent; they are
each made of
congruent, regular
polygons.

11. 5 PLATONIC SOLIDS
regular tetrahedron
regular octahedron
regular dodecahedron
regular hexahedron (cube)
regular icosahedron

12. ARCHIMEDIAN
SOLIDS
or
semi-regular polyhedra
Polyhedra
which are
made of more
than one type
of congruent,
regular
polygons.

13. A FEW OF THE
13 ARCHIMEDIAN SOLIDS
Truncated Icosahedron
aka
Buckyball or Soccer Ball
Truncated Cube
Truncated Octahedron
Cuboctahedron