Reason Statement Step DA AB Given ADEA ADFC ZDAB E LFDC Corresponding Parts of Congruent Triangles are Congruent (CPCTC) AD DC AB DC Transitive Property If two linès cut by a transversal form congruent corresponding angles, then the two lines are parallel 4. AB || DC ABCD is a parallelogram because it is a quadrilateral with one pair of opposite sides parallel and congruent ABCD is a parallelogram F D A В 5

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