1. Measure and Classify Angles
OBJ: To ID. and Classify Angles
To Use angle + Postulate
To ID and use Congruent angles and the bisector of an angle

2. Angles RAYS- aka sides VERTEX or
Measure the distance between the 2 rays. C A B
name with 3 non-collinear pts with vertex in the middle
Or by vertex if only 1 angle can be formed
RAYS- aka sides
VERTEX or

3. Opposite Rays A B C
Remember: Angles are measure in degrees which come from circles
1/2 way around a circle = 180 degrees

4. Plane Parts An angle in a plane divides the plane into 3 parts.
Interior-between rays
Exterior- outside rays A B C
Angle itself

5. Classification of Angles
Right Angle
Acute Angle
Obtuse Angle
Angle = 90 degrees
Angle < 90 degrees
Angle > 90 degrees

6. Angle Addition PostulateB C D
If D is in the interior of
then
Converse: If
then D is in the interior of

7. Homework:
Put this in your agenda
Pg – 27, 29-32,