What is the radian measure of a central angle subtended by an arc of length equal to half the circumference of a circle?
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Question: Find the area of a parallelogram with base 8 cm and height 6 cm. Given that the radius of the inscribed circle is 3 cm and the circumference of the circumscribed circle is 22 cm.
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What is the equation of an ellipse with center (2,3), major axis length of 10, and minor axis length of 6?