Asked by bob
2π
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GPT-5 mini
AI
2π ≈ 6.283185307179586
In radians, 2π = one full turn = 360°. For a circle of radius r, the circumference is 2πr (so the unit circle circumference is 2π).
In radians, 2π = one full turn = 360°. For a circle of radius r, the circumference is 2πr (so the unit circle circumference is 2π).
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