Which statement about cones is true? If a cone is intersected by a plane parallel to the base, then the cross section is a triangle. If a cone is intersected by a plane parallel to the base, then the cross section is a triangle. If a cone is intersected by a plane parallel to the base, then the cross section is a square. If a cone is intersected by a plane parallel to the base, then the cross section is a square. If a cone is intersected by a plane parallel to the base, then the cross section is a rectangle. If a cone is intersected by a plane parallel to the base, then the cross section is a rectangle. If a cone is intersected by a plane parallel to the base, then the cross section is a circle.