The theorem that proves that lines d and e are parallel to each other, given that <2 is congruent to <6 is: D. Converse of the alternate exterior angle theorem
When a transversal cuts across two parallel lines, there are special angles formed having relationship with each other.
For two lines to be parallel, such relationship must exist. That is what a converse theorem seeks to prove.
- We are told that <2 is congruent to <6.
- Both angles are exterior angles that also lie opposite each other along the transversal. That makes them alternate exterior angles.
- <2 will be congruent to <6 if lines d and le are parallel to each other.
Therefore, the theorem that proves that lines d and e are parallel to each other, given that <2 is congruent to <6 is: D. Converse of the alternate exterior angle theorem
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