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    Question

    If the height of equilateral triangle is 12 cm, then

    find out the area of its circumcircle?
    A 32╧Аcm┬▓ Correct Answer Incorrect Answer
    B 64╧Аcm┬▓ Correct Answer Incorrect Answer
    C 40╧Аcm┬▓ Correct Answer Incorrect Answer
    D 60╧Аcm┬▓ Correct Answer Incorrect Answer

    Solution

    Height of an equilateral triangle = тИЪ3/2 ┬а├Ч side┬а Side = h ├Ч 2/тИЪ3 = 12 ├Ч 2/тИЪ3 = 8тИЪ3 Radius of circumcircle = side/тИЪ3 = (8тИЪ3)/тИЪ3 = 8 cm Area of circumcircle = ╧Аr┬▓ = 8┬▓╧А = 64╧А

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