1. Chapter 6
Quadrilaterals

2. Section 1 Polygons

3. Each traffic sign below is an example of a polygon
Each traffic sign below is an example of a polygon. Notice that each sign is formed with straight lines.

4. A _________________________ is a plane figure that is formed by three or more segments called __________________. Each side intersects exactly two other sides at each of its endpoints. Each endpoint is a _________________ of the polygon.

5. Two vertices that are the endpoints of the same side are called consecutive vertices. For example, in polygon PQRST, R and S are consecutive vertices. A segment that joins two nonconsecutive vertices of a polygon is called a __________________. Polygon PQRST has two diagonals from vertex R, RP and RT.

6. Example 1: Identify Polygons Is the figure a polygon
Example 1: Identify Polygons Is the figure a polygon? Explain your reasoning.

7. Classifying Polygons You can classify polygons by the number of sides they have. Some special types of polygons are listed below.

8. Example 2: Classify Polygons Decide whether the figure is a polygon
Example 2: Classify Polygons Decide whether the figure is a polygon. If so, tell what type. If not, explain why.

9. Checkpoint: Identify and Classify Polygons Decide whether the figure is a polygon. If so, tell what type. If not, explain why.

12. Example 3: Find Angle Measures Find the measure of <S.

13. Checkpoint: Find Angle Measures of Quadrilaterals Find the measure of <A.

14. EXIT SLIP