- Polygons are plane figures with three or more sides.
- A polygon is a closed figure made by joining line segments, where each line segment intersects exactly two others.
- Polygons are named according to the number of sides and angles they have. The most familiar polygons are the triangle, the rectangle, and the square.
- A regular polygon is one that has equal sides.
The table lists all the polygons having up to 10 sides.
Polygons | No. of sides | No. of angles | No. of vertices | No. of diagonals |
Triangle | 3 | 3 | 3 | 0 |
Quadrilateral | 4 | 4 | 4 | 2 |
Pentagon | 5 | 5 | 5 | 5 |
Hexagon | 6 | 6 | 6 | 9 |
Heptagon | 7 | 7 | 7 | 14 |
Octagon | 8 | 8 | 8 | 20 |
Nonagon | 9 | 9 | 9 | 27 |
Decagon | 10 | 10 | 10 | 35 |
Example: Identify the shape
Answer: heptagon
Directions: Identify the name of the geometric shape for the following questions. Also draw kinds of polygons and write their properties.
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