code: func (r Rect) Edges() [4]Line {
  	corners := r.Vertices()
  
  	return [4]Line{
  		{A: corners[0], B: corners[1]},
  		{A: corners[1], B: corners[2]},
  		{A: corners[2], B: corners[3]},
  		{A: corners[3], B: corners[0]},
  	}
  }
docs: // Edges will return the four lines which make up the edges of the rectangle.