The matches are as follows:
- \( h > 50 \): greater than
- \( h \leq 20 \): less than or equal to
- \( h \geq 30 \): greater than or equal to
Thus, the final answer is:
\[
\boxed{
\begin{align_}
h > 50 & : \text{greater than} \\
h \leq 20 & : \text{less than or equal to} \\
h \geq 30 & : \text{greater than or equal to}
\end{align_}
}
\]