Students practice finding the measures of angles using the trig ratios of Sine, Cosine and Tangent in a game format. Set includes 4 different sets of dominoes: 8 Dominoes, 12 Dominoes, 16 Dominoes and 24 Dominoes. The smaller sets are great for pairs or even a student who likes to work alone. The larger sets are good for groups of 3 or 4. Half of each domino have a triangle with missing angle marked, the other half has the measure of another angle. Dominoes are cut apart, placed face down and students draw all dominoes equally. Student with "start" places the first domino and then student with the angle measure/triangle in their hand plays the next. This continues until one student is out of dominoes and is declared the winner. I usually give 5 points per domino left in other students hands and keep a running tally. Students love playing games in the classroom and this set will give them the opportunity to practice solving linear systems of equations.