# Answer on Linear Algebra Question for anne

Question #2881

Let a,b and c be three vectors such that a + b + c = 0. Given that a x b = b x c = c x a. Explain what this means geometrically. (Your answer should refer to a triangle)

Expert's answer

If a+b+c = 0, he vectors a,b,c lay on the same plane and we can construct the triangle using these vectors.

a x b = b x c = c x a& - you can make sure that if the vectors form the triangle, the pairwise products of them would be equal, since the vector product equals the the area of the parallelogram with vectors as sides, which, in turn, equals to double area of the triangle.

a x b = b x c = c x a& - you can make sure that if the vectors form the triangle, the pairwise products of them would be equal, since the vector product equals the the area of the parallelogram with vectors as sides, which, in turn, equals to double area of the triangle.

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