def points_distance(x1, y1, x2, y2)
      Math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
    end
def points_distance(x1, y1, x2, y2)
      Math.sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
    end
Calculate the distance between two points