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What is pi? If the area of a circle is 49π, what is its circumference? If a circle is inscribed in a square, what is the ratio of the areas of the circle and the square?

In the above sector, the central angle is \( 0.76 \) radians and the radius is \( 8 \). What is the area of the sector?

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A circular sector with a radius of 10 has an area of 200. What is the central angle (in radians)?

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The above figure shows a quarter circle that is covered by a right triangle. If the radius of the circle is \( 16 \), what is the area of the shaded region?

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A circular sector with central angle 5 radians has an area of 250. What is its radius?

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