Polygons Lesson
Presentation
•
Mathematics
•
3rd Grade
•
Hard
Joseph Anderson
FREE Resource
5 Slides • 0 Questions
1
POLYGONS
2
POLYGONS
Polygon comes from Greek. Poly- means "many" and -gon means "angle".Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).
3
TYPES OF POLYGON
Regular polygons have all sides and angles are equal but an irregular polygon does not have all sides and angles equal.
- Regular Polygons
- Irregular Polygons
4
Name | Sides | Angle |
|---|---|---|
Triangle or Trigon | 3 | 60° |
Quadrilateral or Tetragon | 4 | 90° |
Pentagon | 5 | 108° |
Hexagon | 6 | 120° |
Heptagon or Septagon | 7 | 128.57° |
Octagon | 8 | 135° |
Nonagon or Enneagon | 9 | 140° |
Decagon | 10 | 144° |
Hendedecagon or Undecagon | 11 | 147.27° |
Dodecagon | 12 | 150° |
Triskaidecagon | 13 | 152.31° |
5
Name | Sides | Angle |
|---|---|---|
Tetrakaidecagon | 14 | 154.29° |
Pentadecagon | 15 | 156° |
Hexakaidecagon | 16 | 157.5° |
Heptadecagon | 17 | 158.82° |
Octakaidecagon | 18 | 160° |
Enneadecagon | 19 | 164.05° |
Icosagon | 20 | 162° |
POLYGONS
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