1. 1.4 Pairs of Angles

2. Pairs of Angles
Adjacent Angles- two angles that share a side and a vertex.
Linear pair- a pair of adjacent angles who add up to be 180o

3. Practice Problems:
Tell whether the angles are only adjacent, adjacent and form a linear pair, or not adjacent.
AEB and BED

4. Practice Problem:
Tell whether the angles are only adjacent, adjacent and form a linear pair, or not adjacent.
AEB and BEC

5. Practice Problems:
Tell whether the angles are only adjacent, adjacent and form a linear pair, or not adjacent.
DEC and AEB

6. Other Types of Angles
Complementary Angles- two angles who add up to be 90o
Supplementary Angles- two angles who add up to be 180o

7. Practice Problems:
Find the complement of F

8. Practice Problems:

9. Practice Problems:

10. Practice Problems:
An angle is more than 3 times the measure of is complement. Find the measures of the angles.
Check it out (Pg. 29, #3)

11. Practice Problems:
Light passing through a fiber optic cable reflects off the walls of the cable in such a way that 1 ≅ 2, 1 and 3 are complementary, and 2 and 4 are complementary.
If m1 = 47°, find m2, m3, and m4.
Check it out (Pg. 30, #4)

12. Vertical Angles
Vertical Angles- two nonadjacent angles formed by intersecting lines . (Across each other on an x)
Vertical Angles are congruent

13. Practice Problems:
Name the pairs of vertical angles.

14. Practice Problems:
Find x and the measure of