Vectors 2D

输入两个向量，计算和，差和向量的数量积。

Calculations with vectors in 2D, the ability to enter vectors directly or using the coordinates of points in the plane. Applications for each specified vector calculates its size, forming an angle with the positive part of the x-axis and vector opposite. For two specified vectors calculates the vector sum, difference and scalar product.

The application contains a chart of both vectors (entered by user) and the vector sum and vector difference.

The application supports the following languages​​: English, Spanish, Czech, Portuguese.