1951 AHSME Problem 29

Of the following sets of data the only one that does not determine the shape of a triangle is:

\begin{array}{l} \textbf{(A)}\ \text{the ratio of two sides and the inc{}luded angle}\\ \qquad\textbf{(B)}\ \text{the ratios of the three altitudes}\\ \qquad\textbf{(C)}\ \text{the ratios of the three medians}\\ \qquad\textbf{(D)}\ \text{the ratio of the altitude to the corresponding base}\\ \qquad\textbf{(E)}\ \text{two angles} \end{array}

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.