2. [2] Rectangle $A B C D$ has side lengths $A B=12$ and $B C=5$. Let $P$ and $Q$ denote the midpoints of segments $A B$ and $D P$, respectively. Determine the area of triangle $C D Q$.
Answer: 15. Note that $[C D P]=\frac{1}{2} \cdot 5 \cdot 12=30$, while the area of triangle $C D Q$ is half of the area of triangle $C D P$.