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Thread: 3 circles

  1. August 26th 2010, 04:48 AM #1
    aeroflix
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    3 circles

    3 circles of radii 3,4,5 touch each other externally. find the angles of the triangle by joining the centers.

    tip: law of cosines can help
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  2. August 26th 2010, 02:43 PM #2
    skeeter
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    Quote Originally Posted by aeroflix View Post
    3 circles of radii 3,4,5 touch each other externally. find the angles of the triangle by joining the centers.

    tip: law of cosines can help
    triangle will have sides of 7, 8, and 9 ... now use the given "tip".
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