Calculate Side DC in Parallelogram ABCD with Area 72Y cm²

To find the side length $DC$ of parallelogram $ABCD$ with an area of $72y \, \text{cm}^2$:

• Given: Area = $72y \, \text{cm}^2$ and height = $9 \, \text{cm}$ (from the base).
• Formula for area: $\text{Area} = \text{base} \times \text{height}$.
• Rearrange to solve for base $DC$: $\text{base} = \frac{\text{Area}}{\text{height}}$.
• Substitute the given values: $\text{base} = \frac{72y}{9}$.
• Simplify: $\text{base} = 8y$.

Therefore, the length of $DC$ is $8y \, \text{cm}$.