Section 1-6 Angle Pair Relationships

Vertical angles Formed when two lines intersect. Vertical Angles are Congruent. 1 2

Linear pair Formed by two adjacent angles whose noncommon sides are opposite rays. 12

Are and a linear pair? Are and vertical angles? Are and a linear pair? Are and vertical angles? Yes No

Complimentary angles Two angles whose measures have the sum of 90 degrees

1 2 are complementary angles Each angle is called the complement of the other. Ex: is the complement of

1 2 Example

Supplementary angles Two angles whose measures have the sum of 180 degrees

3 4 are supplementary angles. Each angle is called the supplement of the other. Ex: is the supplement of

Example 3 4