Angle guide

Goal

Estimate the angle shown on screen in degrees. Closer guesses earn more stars — guess within 1° for the maximum 5-star result.

How to play

• Look at the two lines meeting at a vertex.
• Use the slider (or type a number) to set your guess in degrees.
• Submit — you'll see the actual angle and your accuracy in stars.

Scoring

• Within 1° — 5 stars
• Within 5° — 4 stars
• Within 10° — 3 stars
• Within 20° — 2 stars
• Further off — 1 star

Streak

Your streak only advances on a 3-star result or better — that means guessing within 10° of the true angle. A result of 2 stars or fewer breaks the streak, even if you play every day.

Estimating accurately

Judge against the angles you already know rather than guessing a number. A right angle is the anchor: decide first whether the angle is under or over ninety degrees, then halve the remaining range. Forty-five and thirty degrees are the next most reliable references, and most people can place an angle within a few degrees once they have bracketed it that way.

Why it is one guess

There is no feedback loop to exploit - you commit once per day, so the estimate has to be right first time. That is what makes the star bands meaningful: they measure a single judgement rather than a search.

Reset

The same angle is shown to every player each day, resetting at midnight Melbourne time.