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AP EAMCET2001MathematicsThree Dimensional Geometry

If the extremities of diagonal of a square (1,-2,3),(2,-3,5) , then the length of its side, is

Options

  1. A6
  2. B3
  3. C5
  4. D7

Correct answer

B. 3

Step-by-step solution

Let side of the square is a Then, the length of the diagonal A C=a 2 . Also, length of the diagonal array r A C= (1-2)^2+(-2+3)^2+(3-5)^2 = 1+1+4 = 6 Thus, a 2 = 6 a= 3 array

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