1. Parallel Lines & Transversals

2. Transversal A line, ray, or segment that intersects 2 or more COPLANAR lines, rays, or segments.

3. interior INTERIOR –The space INSIDE the 2 lines EXTERIOR -The space OUTSIDE the 2 lines exterior

4. Special Angle Relationships Interior Angles Alternate Interior Angles – 1 4 2 6 5 7 8 3

5. Special Angle Relationships Same-Side Interior Angles – 5 6 4 12 7 8 3

6. Special Angle Relationships 1 4 2 6 5 78 3 Exterior Angles Alternate Exterior Angles –

7. Special Angle Relationships Same-Side Exterior Angles – 1 4 2 6 5 78 3

8. Special Angle Relationships Corresponding Angles: 1 4 2 6 5 7 8 3

9. Special Angle Relationships Vertical Angles: 1 4 2 6 5 7 8 3

10. Special Angle Relationships Supplementary Angles: 1 4 2 6 5 7 8 3

11. Special Angle Relationships Adjacent Angles – 1 4 2 6 5 7 8 3

12. Parallel Lines & Transversals DAY #2

13. Special Angle Relationships WHEN THE LINES ARE PARALLEL ♥Alternate Interior Angles are CONGRUENT ♥Alternate Exterior Angles are CONGRUENT 1 4 2 6 5 78 3 If the lines are not parallel, these angle relationships DO NOT EXIST.

14. Special Angle Relationships WHEN THE LINES ARE PARALLEL ♥Same Side Interior Angles are SUPPLEMENTARY ♥Same Side Exterior Angles are SUPPLEMENTARY ♥Supplementary Angles are SUPPLEMENTARY 1 4 2 6 5 78 3 If the lines are not parallel, these angle relationships DO NOT EXIST.

15. Special Angle Relationships WHEN THE LINES ARE PARALLEL ♥Corresponding Angles are CONGRUENT ♥Vertical Angles are CONGRUENT 1 4 2 6 5 78 3 If the lines are not parallel, these angle relationships DO NOT EXIST.

16. Let’s Practice m<1=120° Find all the remaining angle measures. 1 4 2 6 5 78 3 60° 120°

17. Another practice problem Find all the missing angle measures. 137°