(a)
Parallel lines, and I are intersected by transversal m, forming angles 1 to 8, as shown in the diagram.
m
1
2
5
6
3
a. Identify all of the pairs of alternate interior angles.
Pair 1:
22 and 2
Pair 2:
23 and 2
b. Use rigid motion to explain why alternate interior angles are equal in measure.