Download Protractors, Angles, and Notation

Good afternoon!
Be ready with…
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Pencil, calculator, textbook
Completed 1.1 homework assignment
Geometry Definitions Pages (yellow)
Brain!
- The Glovernment
Angles, Notation, and Protractors
Angle Notation – Three Possibilities
B
Vertex
A
A
BAC or CAB
C
Congruent Angles & Angle Measure
E
B
30˚
D
A
mBAC  30
BAC  EAD
C
Angle Bisector
B
A
BAD  CAD
D
C
Using your Protractor
Is the angle 60 or
120 degrees?
Notice: protractor is centered on the vertex
of the angle. Be sure you use the correct
number line when measuring.
Naming Angles: When do I have
to use one letter or three?
B
D
A
C
Work Time Expectations
Stay in your assigned seat.
 Make the most of the opportunity.
 Your neighbor is an excellent resource.
 Conversations should be math related.
 Shouting or talking to your friend
across the room is obnoxious and
distracting. We have a large class and
you must be mindful of the volume of
your voice.

Assignment:
1.2 #1-5, 7-14, 16-17, 21, 31-39
Use a pencil and straightedge to make
neat drawings.
 Focus on using proper notation to
identify angles and congruent figures.
