Sample Response: By the parallelogram angle theorem, opposite angles of a parallelogram are congruent. Therefore, angle T must be congruent to angle G, and angle G must be congruent to angle L. By the transitive property of congruence, angle T is congruent to angle L. What did you include in your response? Check all that apply.Opposite angles of a parallelogram are congruent.Angle T must be congruent to angle G.Angle G must be congruent to angle L.Therefore, angle T must be congruent to angle L.