This memory/concentration game provides practice with lines, line segments, intersecting, parallel, perpendicular, and intersecting lines, rays, vertices, degree, and right, acute,obtuse, and straight angles. There are 24 cards, (12 pairs). One page contains the directions. The 2nd page contains the 24 memory cards. This set of memory cards matches geometry words with the correct models/illustrations. Also, be sure and look for my vocabulary memory game for the same geometry words that are used with this game. It is called Lines/Angles Memory Game 2,(Vocabulary).