Which statement is true?
• The angle measures 50°, 60°, and 70° do not determine a triangle.
• The side lengths 9 ft, 12 ft, and 15 ft do not determine a triangle.
• There is one unique triangle with angle measures of 50°, 60°, and 70°.
• There is one unique triangle with side lengths of 9 ft, 12 ft, and 15 ft.