#### description

- Convex polygons
- Concave polygons

#### notes

**Convex polygon** is defined as a polygon withall its interior angle less than 180°. Convex polygone is shown following

fig .

A **concave polygon** is defined as a polygon with one or more interior angles greater than 180°. It is shown as following fig .

#### Shaalaa.com | Convex and Concave Polygons

#### Related QuestionsVIEW ALL [1]

Examine the table. (Each figure is divided into triangles and the sum of the angles deduced from that.)

Figure |
||||

Side |
3 | 4 | 5 | 6 |

Angle sum |
180° |
2 × 180° = (4 − 2) × 180° |
3 × 180° = (5 − 2) × 180° |
4 × 180° = (6 − 2) × 180° |

What can you say about the angle sum of a convex polygon with number of sides?

a) 7

b) 8

c) 10

d) n