AHSME 1952 Problem 15

The sides of a triangle are in the ratio $6:8:9$. Then: $\textbf{(A) \ }\text{the triangle is obtuse}$ $\textbf{(B) \ }\text{the angles are in the ratio }6:8:9$ $\textbf{(C) \ }\text{the triangle is acute}$ $\textbf{(D) \ }\text{the angle opposite the largest side is double the angle opposite the smallest side}$ $\textbf{(E) \ }\text{none of these}$