ADVERTISEMENT Happy Glass 2 PLAY NOW Happy Glass 2 ADVERTISEMENT 2048 OvO Retrobit Football Atari Breakout OSU Google Snake Papa's Burgeria Among Us Aquapark.io Eggy Car Bottle Flip 3D Retro Bowl Moto X3M Basketball Legends Smash Karts Slope Geometry Dash Drift Hunters CSGO Surfing Swerve ADVERTISEMENT Happy Glass 2 Happy Glass 2 is a geometry math activity where students can learn more about two-column proofs, triangles, and more. All of these activities help students with their knowledge of side angle side, side side side, and angle angle side.