TRIGONOMETRY!
A mean professor smoking a pipe oulines the fundamental principles of trigonometry.
professor fails you for not knowing the pythagorean theorem.
something to do with triangles?
random colorful triangles
two retarded triangles
two acute triangles complimenting each other
Two acute triangles flirting with each other using puns with the word acute.
Flirting triangles
Doodle or Die is the game of "telephone" with drawing!