State and explain Triangle law of addition of vectors
Please refer the following links for the answer:
https://www.meritnation.com/ask-answer/question/sir-can-u-please-explain-me-parallogram-law-and-triangle/mathematical-physics/1089756
OR
https://www.meritnation.com/ask-answer/question/pl-prove-the-triangle-law-of-vector-addition-mathematically/motion-in-a-plane/1880030