A line t runs upward to the right through two parallel horizontal lines r and s, forming 8 angles numbered from 1 to 8. transversal t cuts parallel lines r and s. which angles must be congruent to ∠2? a. ∠3, ∠6, and ∠7 b. ∠7 only c. ∠7 and ∠6 d. ∠3, ∠5, and ∠6