Help:Geometry Proof

The two-column proof with missing statements and reasons proves that if a line parallel to one side of a triangle also intersects the other two sides, the line divides the sides proportionally.

Statement
Reason
1.
1. Given
2. is a transversal that intersects two parallel lines
2. Conclusion from Statement 1
3. ∡BDE ≅ ∡BAC
3. Corresponding Angles Postulate
4.
4.
5. ∆ABC ~ ∆DBE
5. Angle-Angle (AA) Similarity Postulate
6.
6.

Question

Help:Geometry Proof


The two-column proof with missing statements and reasons proves that if a line parallel to one side of a triangle also intersects the other two sides, the line divides the sides proportionally. 

Statement
Reason
1. 
1. Given
2.  is a transversal that intersects two parallel lines
2. Conclusion from Statement 1
3. ∡BDE ≅ ∡BAC
3. Corresponding Angles Postulate
4.
4.
5. ∆ABC ~ ∆DBE
5. Angle-Angle (AA) Similarity Postulate
6.
6.

anonymous · Answer

attachment

anonymous · Answer

The full question is in the diagram but i need to know the statement and justification for rows 4 and 6