The purpose of this Instructable is to help students distinguish between Acute, Obtuse, Right & Straight Angles by playing a variation of Rock, Paper & Scissors. Your students will love it!

Note: Most rock, paper, scissor games are played with an odd number of choices in order to optimize game play. This insures that each move (rock, paper or scissors) has the same probability of winning. I choose to use four choices obtuse, acute, right and straight because they are the most common classification of angles that students must learn. Using an even number of choices creates some uneven outcomes and alters the strategy of game play, but this can be overlooked since the ultimate goal is for students to learn the concepts as opposed to being the winner

It does make it easy for projects where multiple angle situations can occur and I will most likely use it when I am programming movements or some rocket physics out on the oval.