1. Tues 19Feb19 Geometry B Per 3 & 4
Agenda
New Homework Procedure
Properties of Polygons
New vocabulary for today:

2. On the top of each assignment, write:
                      New Homework procedure: 
                     effective 2/18/2019
On the top of each assignment, write:
your name,
the date 
the section number of the assignment, for example 8.1 
As soon as you enter, take out your homework
If it is not out , you are responsible for showing it to me later.
Keep your assignment until you see it in gradebook.

3. Familiar Vocab
Polygon
Congruent
perimeter

4. Chapter 8
Polygons and Area

5. Section 1 Classifying Polygons

7. A polygon is ___convex____________ if no line that contains a side of the polygon passes through the interior of the polygon. A polygon that is not convex is called __concave_____________________.

9. Example 1: Identify Convex and Concave Polygons Decide whether the polygon is convex or concave.

10. Properties of polygons
A polygon is equilateral if all of its sides are congruent. A polygon is equiangular if all of its interior angles are congruent. A polygon is regular if it is both equilateral and equiangular.

12. Example 2: Identify Regular Polygons Decide whether the polygon is regular. Explain your answer. a) b) c)

13. Checkpoint: Describe Polygons Decide whether the polygon is convex or concave. Then decide whether the polygon is regular. Explain your answer. 1) 2) 3)

14. EXIT SLIP Properties of polygons convex concave equilateral
 New vocabulary for today:
Properties of polygons
convex
concave
equilateral
equiangular
regular
Start homework

16. Regular polygon: all angles are ??