Problem (Geometry):
Let $T=12$. Each interior angle of a regular $T$-gon has measure $d^{\circ}$. Compute $d$.

Solution:
From the angle sum formula, $d^{\circ}=\frac{180^{\circ} \cdot(T-2)}{T}$. With $T=12, d=\mathbf{1 5 0}$.

Final answer: 150