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 \[\sqrt{6}.\]