1. Describe Angle Pair Relations
Section 1 – 5
Describe Angle Pair Relations

2. Definition:
Facts/Characteristics:
Examples:
Non-examples:
Non-adjacent
Two angles that share a common vertex and side, but have no common interior points.
Adjacent
Angle A C B D

3. Two angles whose measures have the SUM 90°.
Definition:
Facts/Characteristics:
Examples:
Non-examples:
Two angles whose measures have the SUM 90°.
Complementary
Angles
Adjacent
Non-adjacent

4. Two angles whose measures have the SUM of 180°
Definition:
Facts/Characteristics:
Examples:
Non-examples:
Two angles whose measures have the SUM of 180°
Supplementary
Angles
Adjacent
Non-adjacent

5. Two adjacent angles whose noncommon sides are opposite rays.
Definition:
Facts/Characteristics:
Examples:
Non-examples:
Two adjacent angles whose noncommon sides are opposite rays.
Linear pair SUM to 180° . Remember – “linear” means LINE, so it makes a line!!
Linear Pair

6. Two angles whose sides form two pairs of opposite rays.
Definition:
Facts/Characteristics:
Examples:
Non-examples:
Two angles whose sides form two pairs of opposite rays.
Vertical angles are EQUAL!!!!
Vertical
Angles

7. Example 2: Example 1: Complementary: Supplementary For complementary:
Angle 2 = 90 – 43
Angle 2 = 47°

8. Example 3: Have to find x first: Forms a linear pair which = 180 so:
9x x = 180
16x + 20 = 180
16x = 160
Use x to find y, we have VERTICAL ANGLES for 7x & 2y so:
x = 10
7x = 2y plug in for x
7(10) = 2y
70 = 2y
35 = y

9. Homework 1.5
Pg. 38 – 40
1, 3-7, 8-30 even,
31-32, 40, 42