Lesson 5: Classifying Polygons
Objective: Classify polygons as pentagons, hexagons, heptagons, octagons, nonagons, and decagons.
Review these terms:
Read and understand the descriptions and examples at these site:
Five or More -Sided Shapes
Polygons
Complete the following activities:
Regular Pentagon
Regular Hexagon
Regular Heptagon
Regular Octagon
Regular Nonagon
Regular Decagon
This table summarizes what you should know about polygons:
| Name | Sides | Angles |
| Triangle | 3 | 3 |
| Quadrilateral | 4 | 4 |
| Pentagon | 5 | 5 |
| Hexagon | 6 | 6 |
| Heptagon | 7 | 7 |
| Octagon | 8 | 8 |
| Nonagon | 9 | 9 |
| Decagon | 10 | 10 |
These sites will check your understanding of polygon classification:
Types of Polygons
Polygon Quiz
These sites will review the information presented in lessons 1-5 and will help prepare you for the mid-unit quiz.
Geometry Jeopardy
Geometry Review
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