2) BA and CD are parallel (segments that are collinear with parallel segments are parallel)
3) CDAB is a parallelogram (a quadrilateral with two pairs of parallel sides is a parallelogram)
4) ∠B is congruent to ∠D (opposite angles of a parallelogram are congruent)
5) m∠B = m∠D (congruent angles)
6) m∠D=115° (transitive property)
7) m∠EDA=65° (linear pair)
8) m∠EAD=65° (base angle of an isosceles triangle)
9) m∠E = 50° (sum of angles in a triangle)
