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Geometry
# Properties of Circles

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The paper fan shown was cut from a circle whose area is \(18\pi.\) What is the area of the fan?

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In the square above, what is the area of the section shaded green?

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A quarter circle has the same area as a circle with a radius of 4. What is the radius of the quarter circle?

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What percent of the sector is shaded red?

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A small circle rolls around the edge of a larger circle exactly 11 times to return to its starting location. If the large circle has a diameter of 20, what is the radius of the smaller red circle?

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