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Tell whether each statement is ALWAYS TRUE, SOMETIMES TRUE, or NEVER TRUE.

1.Two circles with the same center are congruent.
2.A chord of a circle is also a diameter of the circle.
3.In a circle, the perpendicular bisector of a chord must pass through the center of the circle.
4.Two arcs with the same measure have the same arc length.
5.Two inscribed angles that intercept the same arc of a circle are congruent.
6.Tangents to a circle intersects the circle at the two points.
7.If sit a semicircle, then ST is the diameter of the circle.
8.The measure of an arc is equal to the measure of its central angle.
9.If a line is perpendicular to radius of a circle then the line is tangent of the circle. ​