Angled is a daily angle game
Angled is a free daily angle guessing game played in your browser. An angle appears on a dial for three seconds, then vanishes, and its reference line moves. Rebuild the angle from memory by dragging the dial until the gap looks the same as the one you saw. There is no protractor or number to read, and no download or sign-up.
Each round is scored on how many degrees you were off, scaled to the angle you were shown, so a small miss on a small angle costs the same as a proportionate miss on a large one. Five angles a day, one attempt each, and every player in the world gets the same five. Play, then see where your score sits on today's curve.
To estimate an angle by eye, compare the gap with familiar angles: a right angle is 90 degrees, half of that is 45 degrees, and a straight line is 180 degrees. When the reference line moves, remember the size of the gap rather than the direction the lines pointed. New daily rounds arrive at midnight in your local time.
Why some angles are harder than others
People do not see angles exactly as drawn. A study in PNAS (Nundy, Lotto, Coppola, Shimpi and Purves, 2000) found that observers overestimate acute angles and underestimate obtuse ones, while right angles look almost exactly right. The distortion was around 1 to 3 degrees per arm of the angle. Angled tests the same eye under a harder condition: you see the angle for three seconds, it disappears, and then you rebuild it from memory.
Questions
- How do you guess an angle by eye?
- Compare it with angles you already know: 90 degrees is a square corner, 45 is half of that, and 180 is a straight line. Then judge whether the gap is bigger or smaller than the nearest one.
- How is Angled scored?
- By how many degrees you were off, scaled to the size of the angle. A small miss on a small angle costs the same as a proportionate miss on a large one.
- Are acute angles harder to judge?
- Research shows acute angles tend to look wider than they are and obtuse angles narrower. Right angles are judged most accurately.
- Is there a protractor or a number to read?
- No. There are no instruments or readouts, only your eye and your memory of the gap.
Angled is one of the free daily estimation games on Freehand. The others: Halved, cut it in half game; Dropped, projectile game; Counted, guess how many game; Timed, time estimation game; and Balanced, center of mass game.