Game for 2 players
Player 1 and 2 estimate the angle.They secretly write their estimate on a piece of paper.
Player 1 use the protractor to measure accurately the angle under supervision of player 2 (they will swap roles in next round). They have to agree on a measure.
They can check their measure by ticking the "check angle measure box".
Both players show their estimates. The closest one gets a point.
The player who lost unticks both boxes. the protractor disappears and 3 points appears so that he can modify the angle. He can then ticks the first box again the bring the protractor back.
To be repeated until one player gets 2 or 3 points.
You can organise a tournament or a league or let students choose their opponents to collect victories.