This game practice basice properties used in Geometry: reflexive, symmetric, transitive, linear pair postulate, vertical angles theorem, segment addition postulate, angle addition postulate, definition of congruent segments, right angle congruence theorem, and definition of congruent angles.
To play the game you make copies of the 2 problem sheets on construction paper. Then you make one copy of the boy at the board (the old maid card). I usually make 10 sets of cards. Each set of cards needs 1 old maid. To play the game students need to be in groups of 3. Each student gets 7 cards. When they first get the cards, they see if they have any pairs. Have the group members verify the pairs. When no more pairs can be made, a student 1 picks a card from student 2. Students 1 checks to see if they have a pair, then student 2 picks from student 3. Student 2 checks to see if they have a pair then student 3 picks from student 1, and so on. You will never pick a card from the person that picked from you. Whoever ends the game with the old maid in their hand...loses! My kids love this game.
To change it up, you could also take the old maids out of each deck and turn them upside down on the desk and play memory.
It is a fast an easy way to have 2 different games that students love!