Calculate X in Trapezoid: Area 45 with Height 5

To solve this problem, we'll follow these steps:

• Step 1: Identify the given information.
• Step 2: Apply the appropriate formula for a parallelogram's area.
• Step 3: Rearrange and calculate the unknown $X$.

Now, let's work through each step:

Step 1: We have that the area $S$ is $45$ and the base $b$ is $5$.

Step 2: We use the formula for the area of a parallelogram $S = b \times h$, where in this case, $h$ is $X$. So, we have:

$45 = 5 \times X$

Step 3: Rearrange the equation to solve for $X$:

$X = \frac{45}{5}$

$X = 9$

Therefore, the length of side $X$ is $9$.