Answer:
Explanation:
Given is a triangle ABC. ED is parallel to AB cutting AB at D and BC at E.
The lines are parallel Hence corresponding angles are equal
Angle D = Angle B and Angle E = angle C
Hence in triangles ADE and ABC two angles are congruent.
This implies that ADE and ABC are congruent by AA congruence
Since two angles are congruent the triangles are similar.