What is the missing statement for step 7 in this proof

Statement Reason

1. Quadrilateral DEFG is a parallelogram. given

2.

definition of a parallelogram

3. Draw and . These line segments are

transversals cutting two pairs of parallel lines:

and and and . drawing line segments

4. Place point H where and intersect. defining a point

5. ∠HGD ≅ ∠HEF

∠HDG ≅ ∠HFE

6. Opposite sides of a parallelogram are congruent.

7. ASA criterion for congruence

8. GH ≅ EF

DH ≅ FH

Corresponding sides of congruent triangles are congruent.