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Miscellaneous·2014·Easy

Consider a sphere passing through the origin and the points (2, 1, -1), (1, 5, -4), (-2, 4, -6). What is the radius of the sphere?

Consider a sphere passing through the origin and the points (2, 1, -1), (1, 5, -4), (-2, 4, -6). What is the radius of the sphere?

Options

  1. a.

    √12

  2. b.

    √14

    Correct answer
  3. c.

    12

  4. d.

    14

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