3 straws are shown. The length of one straw is 12 inches, the length of another straw is 9 inches, and the length of the last straw is unknown. Marlena has 3 straws. Two straws have the lengths shown. She does not know the length of the shortest straw, but when she forms a triangle with all three, the triangle is obtuse. Which are possible lengths of the shortest straw? Check all that apply. 5 inches 6 inches 7 inches 8 inches 9 inches.