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JEE Main & Advanced Mathematics Vector Algebra Question Bank Modulus of vector Algebra of vectors

  • question_answer
    If the position vectors of the vertices of a triangle be \[6\mathbf{i}+4\mathbf{j}+5\mathbf{k},\,\,\,4\mathbf{i}+5\mathbf{j}+6\mathbf{k}\] and \[5\mathbf{i}+6\mathbf{j}+4\mathbf{k},\] then the triangle is

    A) Right angled         

    B) Isosceles

    C) Equilateral             

    D) None of these

    Correct Answer: C

    Solution :

    Equilateral, since each side is of length \[\sqrt{6}.\]


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