1. 3.1 Identify Pairs of Lines and Angles

2. Transversal – a line that intersects two or more coplanar lines at different points.

3. Corresponding Angles (C) – have corresponding positions
Corresponding Angles (C) – have corresponding positions. For example: label 2 and  6 t 2 6

4. F Corresponding Angles (C) What shape do corresponding angles make? t2 F 6

5. Alternate Interior Angles (AI) – lie on alternate (opposite) sides of the transversal on the interior (inside/between) the two lines. For example: label  4 and 5 t 4 5

6. Z Alternate Interior Angles (AI)
What shape do alternate interior angles make? t Z 4 5

7. Alternate Exterior Angles (AE) – lie on alternate (opposite) sides of the transversal and on the exterior (outside) of the two lines. For example: label 1 and 8 t 1 8

8. Not really Alternate Exterior Angles (AE)
Do alternate exterior angles have a shape?
Not really t 1 8

9. Same Side Interior Angles (SSI) – lie on the same side of the transversal and on the (inside) of the two lines. For example: label 3 and  5 t 3 5

10. C Same Side Interior Angles (SSI)
What shape do Same Side Interior angles make? C t 3 5

11. Slanty T shape X shape Don’t forget!!!
Vertical Angles (V) Linear Pair (LP) 3 4 1 2
Slanty T shape
X shape

12. Determine if the angles are alternate interior, same-side interior, corresponding, vertical angles, linear pair or no relationship.
1. 4 and 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Same-Side Interior
Highlight ange 4 and 7.

13. Determine if the angles are alternate interior, same-side interior, corresponding, vertical angles, linear pair or no relationship.
2. 6 and 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Alternate Interior
Highlight ange 4 and 7.

14. Determine if the angles are alternate interior, same-side interior, corresponding, vertical angles, linear pair or no relationship.
3. 6 and 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Highlight ange 4 and 7.
Corresponding

15. Determine if the angles are alternate interior, same-side interior, corresponding, vertical angles, linear pair or no relationship.
4. 9 and 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Highlight ange 4 and 7.
Linear Pair

16. Determine if the angles are alternate interior, same-side interior, corresponding, vertical angles, linear pair or no relationship.
5. 3 and 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14
No Relationship
Highlight ange 4 and 7.