def base(self):
left_point = Vector2(self.center.x - self.size.width / 2, self.center.y + self.size.height / 2)
right_point = Vector2(self.center.x + self.size.width / 2, self.center.y + self.size.height / 2)
upright_base = Segment(left_point, right_point)
return upright_base.rotate_center(self.center, self.angle)
