geometry
posted by tori .
TWO COLUMN TRIANGLE PROOF
Given: line AB is parallel to line DE, and line AD bisects line BE
Prove: triangle ABC is congruent to triangle DEC by using the ASA (anglesideangle) postulate

You have opposite angles are equal, and alternate interior angles equal, and the line is bisectd so sides are equal. That is ASA. YOu can put this into proof format.