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10 questions from this quiz
A=πr2A = \pi r^2A=πr2
A ring shape
Radius of the outer circle
636363 cm²
A slice like pizza
A=θ360πr2A = \frac{\theta}{360}\pi r^2A=360θπr2
Fraction of the full circle
180°180°180°
A=14πr2A = \frac{1}{4}\pi r^2A=41πr2
1.91.91.9 cm²
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