The sketch shows two parallel lines cut by a transversal. Which pair of angles are alternate interior angles? A) Angle 1 and angle 4

B) Angle 5 and angle 4

C) Angle 6 and angle 4

D) Angle 8 and angle 4

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows. statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.