Respuesta :

you can use side-angle-side postulate 

Answer:

By AA property of similarity, triangles BAC and DFE are similar.

Step-by-step explanation:

Given information: AC║FE and AB║FD.

If a transversal line intersect two parallel lines, then the corresponding angles are equal.

In triangle BAC and triangle DFE

[tex]\angle ABC=\angle FDE[/tex]                  (corresponding angles)

[tex]\angle ACB=\angle FED[/tex]                  (corresponding angles)

Two corresponding angles of triangles are equal. So, by AA property of similarity both triangles BAC and  DFE are similar.

[tex]\triangle BAC\sim \triangle DFE[/tex]

Hence proved.

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