6.What do you call <1 and <7?
A. corresponding angles
B. same-side interior angles
c. alternate exterior angles
D. alternate interior angles
7. Suppose lines r and s are parallel. Which of the following pairs of
angles must be congruent?
A. <4 and <5
C. <1 and <8
B. <4 and <3
D. <3 and <5
8. Suppose lines r and s are parallel. Which of the following pairs of
angles must be supplementary?
A. <1 and <5
C. <3 and <6
B. <5 and <7
D. <3 and <7​