A chord of a circle is equal to the radius of the circle. What is the angle subtended by this chord at the center?

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A 30°
B 60°
C 35°
D 45°

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Answer: B. 60°

Explanation: Since the chord equals the radius, the triangle formed by the center and the two ends of the chord is an equilateral triangle. All angles in an equilateral triangle are 60°.

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A chord of a circle is equal to the radius of the circle. What is the angle subtended by this chord at the center?

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