What is the radian measure of an angle formed by a straight line at the circumference of a unit circle or an angle at the center of a unit circle that intercepts an arc of length equal to its radius?
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Question: What is the variance of the set {3, 5, 7, 9, 11, 13}?
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What is the length of the median of a triangle with side lengths 5, 12, and 13?