This is a bingo game to review the geometry unit that included comparing the measures and lengths of sides and angles in triangles. The bingo cards are included, 6 cards per sheet of paper that you can cut apart and give to each student. After students receive a card, provide the possible answers so they can fill them into the squares in any random order they choose, using each answer only once. I recommend cutting the problems apart so you can show them to the class in any order you like. Students should highlight or circle the answers on their card when you show the problem. You will only need to show 7 or 8 problems before someone has five across, down or diagonally and wins. This takes about 30 minutes from start to finish and most students will participate with little prodding from you. I usually take two or three winners and give bite size candy to the winners. If you run out of questions before anyone wins start randomly calling out answers that were not used. I print this out and use with a document camera but you could also copy to transparencies and use with an overhead projector or import to a flipchart.
comparing sides of one or two triangles
comparing angles of one or two triangles
simplifying square roots
midsegment theorem for triangles