In Exercises 9-12, verify that the segment lengths form a triangle. Is the triangle acute, right, or obtuse? 9. 5, 12, and 13 10. 5, 7, and 8 11. 2, 10, and 11 12. V8, 4, and 6 13. A ski lift forms a right triangle, as shown. Use the Pythagorean Theorem (Theorem 9.1) to approximate the horizontal distance traveled by a person riding the ski lift. Round your answer to the nearest whole foot. 5750 ft 1170 ft X