在下图中，求三角形 XYZ 的面积。 答：___ cm$^2$

1. Identify the base and the corresponding perpendicular height of Triangle XYZ

Taking $YZ$ as the base of Triangle $XYZ$, the base length is $8\text{ cm}$.
The corresponding perpendicular height from $X$ to the line extending $YZ$ is $XW$, which is $9\text{ cm}$.

2. Calculate the area of Triangle XYZ

$\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$
$\text{Area} = \frac{1}{2} \times 8 \times 9 = 36\text{ cm}^2$