1. Angles
#29 Acute angle (def)- angle less than 90° # 28 Right angle (def)- angle = 90° #30 Obtuse angle (def)- angle greater than 90° #31 Straight angle (def)- angle = 180°
#26 Interior of angle
#27 Exterior of angle

2. To Name an Angle- either use 3 letters or number it, never use only 1 letter. Name with vertex in the middle. A
D or never
vertex 2 B C
Congruent angles- angles that have = measures.
- measure of an angle

3. #33 Adjacent Angles (def)-2 coplanar angles that share a common ray
#36 Linear Pair (def)-adjacent angles whose non-common sides form a line. (describes) #39 Linear Pair Theorem- If 2 angles form a linear pair, then they are supplementary.(Value)

4. #35 Vertical Angles(def)- 2 nonadjacent angles formed by intersecting lines (describes)1 3
#42 Vertical Angles Theorem- If 2 angles are vertical, then they are congruent. (value)

5. #37 Complementary angles (def)- 2 angles whose sum is 90°
or 50° 40°

6. #38 Supplementary angles(def) – 2 angles whose sum is 180°
or 145° 35°

7. #34 Angle Bisector(def)- is a ray that divides the angle into 2 congruent angles.
#32 Angle Addition Postulate- sum of the parts = whole