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Geometric Proofs....

Write a justification for each step
Given: AB = EF, B is the midpoint of Line AC and E is the midpoint of Line DF.

1. B is the midpoint of Line AC and E is the midpoint of Line DF.
2. Line AB is congruent to Line BC and Line DE is congruent to Line DF
3. AB = BC, and DE = EF
4. AB + BC = AC and DE + EF = DF
5. 2AB = AC, and 2EF = DF
6. AB = EF
7. 2AB = 2EF
8. AC = DF
9. Line AC is congruent to Line DF


What are the justfications?

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