1. Angles and Bisectors

2. Complementary Angles
Two or more angles are Complementary if the sum of their measures is __90______.

3. Supplementary Angles
Two or more angles are Supplementary if the sum of their measures is __180______.

4. Adjacent Angles
Adjacent Angles are two angles that share a common____vertex___ and ___side_____ , but have no common interior points.

5. Linear Pair
Two adjacent angles are a Linear Pair if their noncommon sides are opposite rays.

6. Vertical Angles
Two angles are Vertical Angles if their sides form two pairs of opposite rays. Vertical Angles are Congruent.

8. Bisect
Divides a segment or angle into two equal parts.
Angle Bisector

9. Midpoint of a segment:
The midpoint of a segment is the point that bisects, or divides, the segment into two congruent segments.
Example: C is the midpoint of and

10. Segment bisector:
Example 6: BC = 3x + 2 and CD = 5x – 10. Solve for x. What is the length of BD?

11. Segment bisector:
Example 7: AC = 5x - 16 and CF = 2x – 4. Solve for x. What is the length of AF?