The three main types of angles are: acute (angles less than 90 degrees), right (angles exactly 90 degrees) and obtuse (angles greater than 90 degrees). For the first game, you will need a package of white paper, a marker and tape. Remove 30 sheets of paper and separate the sheets into three groups of 10. Draw 10 acute angles on one set, then 10 right angles and 10 obtuse angles. Mix all of the sheets up then randomly tape them to a large board. Have your students approach the board and attempt to match angles by type. They must match two acute angles, two obtuse angles or two right angles until all angles have been matched.
This game allows students to group angles according to type. Split your students into three groups and give them each three poster boards. From one poster board, the students in each group will draw and cut out five acute angle, from another poster, cut out five right angles and from the third poster, cut out five obtuse angles. Next, the students will mix up their angles and put them in a pile. Then, each group will pass all of their angles on to a different group. To play the game, each group of students must attempt to sort out the angles that they have been given and classify them by type. The team that does this the fastest wins.
This game teaches students how to match certain types of angles with their corresponding degree measures. All you need for this game is a large whiteboard. On one side of the board, draw 20 angles -- 10 acute and 10 obtuse (since all right angles measure 90 degrees, leave them out of this activity). On the other side of the board, write the degree measurement for each angle. Write the measurements randomly, so that they do not match up with the position of the angles on the other side. Label each degree measurement with a different letter. Have your student come to the board, one by one, and match the angle to its degree measurement, then tell if it is acute or obtuse.
Student must also learn about two concepts closely-related to angle type -- complementary and supplementary angles. Complementary angles are two acute angles whose measurements sum to 90 degrees. Supplementary angles are one acute and one obtuse angle whose measurements sum to 180 degrees. To create a game for these concepts, you could draw 10 acute angles and 10 obtuse angles and give their measurements. Have the students come forward and match each angle with its complement or supplement.