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What is the area of the triangle with vertices (1,2,3) , (2,5,-1) and (-1,1,2) ?

Options

  1. A155 2 square units
  2. B175 2 square units
  3. C155 4 square units
  4. D175 4 square units

Correct answer

A. 155 2 square units

Step-by-step solution

The correct answer is option A

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