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

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.

Familiar Vocab Polygon Congruent perimeter

Chapter 8 Polygons and Area

Section 1 Classifying Polygons

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_____________________.

https://www.geogebra.org/geometry

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

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.

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

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

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

Regular polygon: all angles are ??