1. 1-3
Pairs of Angles

2. Adjacent Angles Definition:
A pair of angles with a shared vertex and common side but do not have overlapping interiors.
Examples:
1 and 2 are adjacent. 3 and 4 are not.
1 and ADC are not adjacent. 4 3
Adjacent Angles( a common side )
Non-Adjacent Angles

3. Complementary Angles Definition: A pair of angles whose sum is 90˚
Examples:
Adjacent Angles
( a common side )
Non-Adjacent Angles

4. Supplementary Angles Definition: A pair of angles whose sum is 180˚
Examples:
Adjacent supplementary angles are also called “Linear Pair.”
Non-Adjacent Angles

5. Vertical Angles Definition:
A pair of angles whose sides form opposite rays.
Examples:
Vertical angles are non-adjacent angles formed by intersecting lines.

6. Example: If m4 = 67º, find the measures of all other angles.

7. Example: If m1 = 23 º and m2 = 32 º, find the measures of all other angles.

8. Example: If m1 = 44º, m7 = 65º find the measures of all other angles.