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10 cards from this deck
The angle subtended at the center of a circle when arc length equals radius
360°360°360°
180°180°180°
Radians === Degrees ×π180\times \frac{\pi}{180}×180π
Degrees === Radians ×180π\times \frac{180}{\pi}×π180
s=rθs = r\thetas=rθ
A=12r2θA = \frac{1}{2}r^2\thetaA=21r2θ
π2\frac{\pi}{2}2π
π3\frac{\pi}{3}3π
2π2\pi2π
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