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niax Group Title

This one has stumped me... Three circles of radii 5 cm, 6 cm and 8 cm are positioned so that they just touch one another. Their centres form the vertices of a triangle. Find the largest angle in the triangle.

  • one year ago
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  1. niax Group Title
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  2. mathstudent55 Group Title
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    The three sides measure 11, 13, and 14. The largest angle is opposite the longest side. Use the law of cosines to find it.

    • one year ago
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    Add the radii of each two adjacent circles.

    • one year ago
  4. ParthKohli Group Title
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    It's pretty easy. The radius remains the same.

    • one year ago
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    |dw:1361866815545:dw|

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