Mini Games
Angle Match
Reproduce a target angle by eye, no protractor. A one-shot precision game scored to 0.01%.
How to play
- Tap Start. A target angle (like 67°) is shown at the top.
- Drag the blue arm around the pivot to set the angle you think matches — release to lock it in.
- Your arm and the true target arm appear. Smaller error = higher accuracy (%).
My Best
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Aim for a Protractor Eye!
Ranking
Rankings reset daily at 00:00 (UTC+0 base).
| RANK | Nickname | Score |
|---|---|---|
| RANK | Nickname | Score |
|---|---|---|
- |  YOU | - |
Your record is only saved in this browser.
Records are not shared across different browsers or devices.
Angle Match is a one-shot precision mini-game where a target angle is given as a number — say 67° — and you rotate an arm around a pivot to reproduce it using nothing but your sense of degrees. There is no protractor and no live readout of your own angle, so you have to feel the angle and commit. The moment you release, the difference between your angle and the true target is converted into an accuracy score from 0 to 100%, shown to two decimal places.
The rules are minimal and there is no time limit. Drag the arm slowly, picture the target wedge in your mind, and let go when it feels right. After you release, the true target arm appears beside yours so you can see exactly how many degrees you were off, then submit to the global ranking or send a challenge link so a friend faces the identical target angle.
This trains angular estimation — a spatial skill most people are surprisingly bad at without practice. Common anchors help: 90° is a clean right angle, 45° splits it in half, 30° and 60° are the corners of a triangle. Tip: judge your arm against those reference angles rather than guessing in a vacuum, and don't overthink it — quick instinct usually beats long deliberation.