Use a two-column proof to prove the Triangle Proportionality Theorem:

Step-by-step explanation:

From the picture attached,

                 Statements                                        Reasons

1). In ΔABC, DE intersects AB and AC  1). Given

2). DE║BC                                              2). Given

3). ∠ADE ≅ ABC                                    3). Corresponding angles postulate

4). ∠AED ≅ ∠ACB                                 4). Corresponding angles postulate

5). ΔADE ~ ΔABC                                  5). AA similarity postulate

6).                                           6). Definition of two similar triangles

Hence proved.  

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve