The formula of barycenter coordinates is learned from an old high school math book.
The formula of barycenter coordinates is really a high school mathematics that I learned last semester in Grade One. The formula of barycenter coordinates is abscissa (X 1+X2+X3)/3 and ordinate (Y 1+Y2+Y3)/3. In mathematics, the coordinates of the center of gravity are defined by the vertices of the simplex. The barycenter coordinate is a kind of homogeneous coordinate.