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    Question

    A chord of a circle is equal to its radius. The angle

    subtended by this chord at a point on the circumference is
    A 80° Correct Answer Incorrect Answer
    B 60° Correct Answer Incorrect Answer
    C 30° Correct Answer Incorrect Answer
    D 90° Correct Answer Incorrect Answer

    Solution

    length of chord = length of radius equilateral triangle is formed angle at the centre = 60° angle subtended by chord at centre = 2 angle subtended by chord at the circumference of circle angle subtended by chord at the circumference of circle = 30°

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