Meaning of corresponding angles

cor'respond'ing an'gles

Pronunciation: [key]
— Geom. Geom.
  1. two nonadjacent angles made by the crossing of two lines by a third line, one angle being interior, the other exterior, and both being on the same side of the third line. Cf. alternate angles.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.