A plane vector is a quantity that has both direction and magnitude in a two-dimensional plane. It is also called a vector in physics,the opposite is a quantity (scalar) that has only size and no direction. The plane vector is indicated by a small arrow above a, b, and c, or it can be expressed by the letters of the start and end points of the directed line segment of the vector.
The addition of vectors satisfies the rules of parallelograms and triangles.
AB+BC=AC。
a+b=(x+x'，y+y')。
a+0=0+a=a。
Algorithm of vector addition:
Exchange law: a+b=b+a;
Combination law: (a+b)+c=a+(b+c).
Vector V1: 2, 4
Vector V2: 1, 5
Click "Calculate" to output the result
Plus: 3, 9
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