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12 cards from this deck
Slice of circle formed by 2 radii from centre
Curved boundary forming edge of a sector
Shorter arc between 2 points on circle's circumference
Angle at circle's centre between 2 radii
θ360°×πr2\frac{\theta}{360°} \times \pi r^2360°θ×πr2
θ360°×2πr\frac{\theta}{360°} \times 2\pi r360°θ×2πr
Central angle in degrees
Radius of the circle
Fraction of complete circle the sector represents
14\frac{1}{4}41
12\frac{1}{2}21
θ360°\frac{\theta}{360°}360°θ
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