1. Chapter 6 Section 6.1
Polygons

3. Examples of Polygons Identify, Name, and Describe Polygons Definition
Definition Polygon
A polygon is a plane figure that is formed by three or more
segments called sides, such that no two sides with a
common endpoint are collinear, and each side intersects
exactly two other sides, one at each endpoint. Each
endpoint is called a vertex of the polygon
Examples of Polygons

4. Identify, Name, and Describe Polygons

5. Identify, Name, and Describe Polygons
Names
Names Polygon Names
A polygons name depends on the number of sides it has
# of Sides
Name 3 4 5 6 7
# of Sides
Name 8 9 10 12 N

6. Non-Convex/Concave: A polygon that is not convex
Identify, Name, and Describe Polygons
Descriptions
Descriptions Describing Polygons
A polygons description depends on its shape
Convex: No line that contains a side of the polygon contains a point in the interior of the polygon
Non-Convex/Concave: A polygon that is not convex

7. Identify, Name, and Describe Polygons

8. Identify, Name, and Describe Polygons

9. Identify, Name, and Describe Polygons

10. Identify, Name, and Describe Polygons

11. Sum interior angles of a quadrilateral
Theorem
Theorem 6.1 Interior Angles of a Quadrilateral
The sum of the measures of the interior angles of a
quadrilateral is 360o
mH + mG + mF + mE = 360o

12. Sum interior angles of a quadrilateral

13. Sum interior angles of a quadrilateral

14. Sum interior angles of a quadrilateral