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There is basically no difference. They are nothing more than 2 different visualizations of how we can graphically add two vectors.

strictly if we say there is one and only difference is that---

Triangle law of vector addition states that when 2 vectors r acting as the adjacent sides of a triangle taken in order. third side of the triangle will give the magnitude of th resultant 7 direction is in opposite order.

Parallelogram law of vector addition states that if 2 vectors r acting as the adjacent sides of a parallelogram, then the diagonal of parallelogram from the point of intersection of two vectors represent their resultant magnitude & direction.

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Q: What is the difference between parallelogram law of vector addition n triangle law of vector addition?
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