The proof that δefg ≅ δjhg is shown.

given: g is the midpoint of hf, ef ∥ hj, and ef ≅ hj.

prove: δefg ≅ δjhg

triangles e f g and j h g share common point g.

statement

reason
1. g is the midpoint of hf 1. given
2. fg ≅ hg 2. def. of midpoint
3. ef ∥ hj 3. given
4. ? 4. alt. int. angles are congruent
5. ef ≅ hj 5. given
6. δefg ≅ δjhg 6. sas
what is the missing statement in the proof?

∠feg ≅ ∠hjg
∠gfe ≅ ∠ghj
∠egf ≅ ∠jgh
∠gef ≅ ∠jhg