oppositely congruent figures

oppositely congruent figures

[¦äp·ə·zət·lē ¦kän‚grü·ənt ′fig·yərz]
(mathematics)
Two solid figures, one of which can be made to coincide with the other by a rigid motion in space combined with reflection through a plane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.