Read the question and statements provided and decide whether the data provided in the statements are sufficient to answer the question.
Question: Find the area of a triangle.
Statements:
I. One of its sides is $6\text{ units}$.
II. It is an equilateral triangle.

To find the area of a triangle, we need specific dimensions.
* Statement I alone tells us only one side is $6\text{ units}$, which is not sufficient because the triangle could have any shape.
* Statement II alone tells us it is an equilateral triangle, but without a specific side length, we cannot calculate the exact numerical area.
* Combining Statement I and Statement II: Since it is an equilateral triangle and one side is $6\text{ units}$, all three sides must be $6\text{ units}$. The area can now be calculated using the formula:

$$\text{Area}=\frac{\sqrt{3}}{4}\times {\text{side}}^2=\frac{\sqrt{3}}{4}\times 6^2=9\sqrt{3}\text{ sq. units}$$

Thus, both statements together are required to answer the question.