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Even smooth shapes are built from hidden waves square(x) = 4/π (sin x + ...) Geometry & music in math

Angle Arcade

Join the daily angle challenge to sharpen your polygon intuition and climb the leaderboard.

Learn geometry by playing: read the How to Play guide → Practice in Fizzical Drill Mode →
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Logic circuit sprint

Meet Zapped ⚡

Build NOT, AND, OR & XOR combos to hit the target output. It’s a quick-hit logic puzzle that pairs perfectly with your daily angle run.

Best experienced on desktop for full circuit control

Play Zapped
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Think you're good at angles? Share this game and see who has the sharpest geometry skills!

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Sarah from NYC just scored 8.2 points • Challenge resets at midnight ET

Angle Arena

Highlighted corner = the angle to guess

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Call Your Shot

Enter the degree measure you think matches the glowing interior angle. Hit submit to see how close you are.

  • Press Enter or click Submit to lock in your guess.
  • After feedback shows, use the same button to move to the next polygon.

Ready when you are

Hit Start to load today’s challenge, then enter your best guess.

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