The symbols of vectors are α, β and γ. Or a, b, c, etc. Used to add arrows to letters a, b, c, etc. The vector can be represented by a directed line segment, the length of the directed line segment represents the size of the vector, the direction pointed by the arrow represents the direction of the vector, and the coordinates represent the plane rectangular coordinate system, the three-dimensional coordinate system and the multi-dimensional vector.

Characteristics of vectors

The instrumental features of vectors are reflected in many branches of mathematics, especially in advanced mathematics and analytic geometry. In high school mathematics learning, vector, as one of the compulsory courses, can cultivate students' mathematical ability and literacy, and help students improve their comprehensive mathematical ability.

In physics and engineering, geometric vectors are usually called vectors. Many physical quantities are vectors, such as the displacement of an object and the force exerted on it by a ball hitting a wall. Contrary to scalars, scalars are quantities with only size and no direction. Some definitions related to vectors are also closely related to physical concepts, such as vector potential corresponding to potential energy in physics.