1. Adjacent angles share a commonB C D
Adjacent angles share a common
vertex and a common arm

2. Supplementary angles are two angles
1150
900
900
650
180 - 90 = 90
180 -
115 = 65
Supplementary angles are two angles
whose sum is 180o

3. COMPLIMENTARY ANGLES 30o 420 60o 480 90 - 60 = 30 90 - 42 = 48
Complimentary angles are two angles whose sum is 900

4. Opposite angles are non-adjacent angles
760
1040 B B
1040
760 A
Opposite angles are non-adjacent angles
that are formed by two intersecting lines

5. A transversal is a straight line that intersects two or more lines.

6. Straight angles measure 1800

7. Corresponding angles These angles form an “F” pattern
1500
300
Do you notice any other angle
relationships in this diagram?
Corresponding angles are matching angles that
are formed by a transversal and two parallel lines.

8. Co-interior angles These angles form a “C” pattern 1200 600 1200 600
Do you notice any other angle
relationships in this diagram?
Co-interior angles are formed by a transversal and 2 parallel lines.
The sum of co-interior angles is 1800.

9. ALTERNATE ANGLES These angles form a “Z” pattern 1200 600
Do you notice any other angle
relationships in this diagram?
Alternate angles are matching angles that are formed by
2 parallel lines and a transversal