Which three types of transformations result in congruent shapes? a. reflection, dilation, rotation b. reflection, translation, dilation c. reflection, rotation, translation d. rotation, dilation, translation

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.