1. Section 1.4 Angles & Their Measures 1/13

2. Parts of the Angle Possible Names 1 Angle Symbol 2/13

3. Parts of the Angle 3/13

4. Bad Naming Convention Bad Name!! A B C D Single Letter naming can only be used if it is the vertex for only ONE ANGLE. 4/13

5. Geometric Notation Refers to the NAME of the object (the angle) Refers to the MEASUREMENT of the object (size of the angle) A B C 5/13

6. Angle Addition Postulate A B C D When D is in the interior of angle ABC 6/13

7. Angle Addition Postulate A B C D 5x +2 7x +6 72 What is the value of x? 7/13

8. Congruent Angles A B C D E F * * If, then 8/13

9. Angle Names – Acute Angle 9/13

10. Angle Names – Right Angle 10/13

11. Angle Names – Obtuse Angle 11/13

12. Angle Names – Straight Angle 12/13

13. Homework 1.4 P. 29 5 – 8, 26 – 28, 29 – 34 (For #29 – 34, use this diagram) 13/13 B D E F C A