# Geometry Class work , i need help please

*label*Mathematics

*timer*Asked: Mar 19th, 2015

**Question description**

What is the missing step in this proof?

1. AD/DB = CE/EB ----------> given
2.AD/DB+1 = CE/EB+1 -------->
Addition Property of Equality

3.AD+DB/DB =CE+EB/EB ---------------> using common denominators

4. *AB* = *AD* + *DB*

*CB* = *CE* + *EB*
----------> segment addition

5.AB/DB =CB/EB ------> Substitution Property of Equality

6.angle *ABC* congruent to angle *DBE* ------------>
Reflexive Property of Congruence

7.triangle * ABC *~ triangle *DBE*
----------> SAS similarity criterion

8. MISSING PROOF? --------- > Corresponding angles of similar triangles are congruent.

9.LINE DE || LINE AC ---------------------------->
If the corresponding angles formed by two lines cut by a transversal are congruent, then the lines are parallel.