Here are two games that should work great for getting students to think and have fun when they are developing their intuition about angles.
Click the picture above to open Guess the Angle in a new tab, full screen. The game allows for up to six teams. The closest guess wins 2 points, any guess within the adjustable tolerance wins 1 point. (You might have noticed that the second team name in the screenshot makes more sense as Tau than Tao. 🌊 The typo is now corrected in the game itself.)
The second geometry team game has two modes. The first mode is just to get them thinking about supplementary and complementary angles. The second mode is for students to also brush off their algebra skills!
https://writinginthestream.com/wp-content/uploads/2026/01/anglesolver2.html
Since it already exists, here’s a link to the game with Team Tao:
https://writinginthestream.com/wp-content/uploads/2026/01/anglegame.html
Conceived by Erik Lokensgard, coded with Gemini.