Section 1-6Angle Pair

Relationships

Vertical angles• Formed when two lines

intersect.

Vertical Angles are Congruent.

12

Linear pair• Formed by two adjacent

angles whose noncommon sides are opposite rays.

1 2

15

4

32

• Are and a linear pair?

• Are and vertical angles?31

• Are and a linear pair?4 5• Are and vertical angles?35

1 2 Yes

Yes

NoNo

Complimentary angles

• Two angles whose measures have the sum of 90 degrees

1

2

21 and are

complementary angles

1

Each angle is called the

complement of the other.

Ex: is the complement

of 2

1

2

Example

3753

Supplementary angles

• Two angles whose measures have the sum of 180 degrees

3 4

43 and are supplementary angles.

Each angle is called the supplement of the other.

Ex: is the supplement of

34

Example

3 411268