The coordinates of the vertices of △DEF are D(−2,3) , E(−1,7) , and F(2,1) . The coordinates of the vertices of △D′E′F′ are D′(3,−2) , E′(7,−1) , and F′(1,2) . Which statement is correct? △DEF is congruent to △D′E′F′ because you can map △DEF to △D′E′F′ using a 180° rotation about the origin, which is a rigid motion. △DEF is congruent to △D′E′F′ because you can map △DEF to △D′E′F′ using a reflection across the line y = x, which is a rigid motion. △DEF is not congruent to △D′E′F′ because there is no sequence of rigid motions that map △DEF to △D′E′F′ . △DEF is congruent to △D′E′F′ because you can map △DEF to △D′E′F′ using 90° counterclockwise rotation about the origin, which is a rigid motion.