A ____ is a closed curve, all points of which are equidistant from a fixed point called the ____ . A ____ is a segment one whose endpoint is in the ____ of the circle and the other endpoint is any point on the circle. A ____ is a segment whose endpoints are any of two different points on the ____. A ____ is a chord which passes through the center of the circle. It is ____ the length of a radius. A ____ is a line in the plane of a circle that intersects the circle at exactly one point. This point is called the ____ .

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