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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 inscribed angle is \( 0.68 \) radians and the radius is \( 4 \). What is the arc length of the sector?

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In the above sector, the inscribed angle is \( 0.84 \) radians and the radius is \( 5 \). What is the perimeter of the sector?

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In the above sector, the inscribed angle is \( 5.64 \) radians and the radius is \( 9 \). What is the perimeter of the sector?

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In the above sector, the inscribed angle is \( 5.64 \) radians and the radius is \( 9 \). What is the arc length of the sector?

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