To find the area of a parallelogram, you can use the formula:
\[ \text{Area} = \text{base} \times \text{height} \]
In your case, it appears you have the dimensions of the parallelogram: two sides of 10 ft each and one side of 9 ft, but we need to identify which measurement represents the base and the height.
Assuming the base is 10 ft and the height (the perpendicular distance from the base to the opposite side) is 9 ft, the area would be:
\[ \text{Area} = 10 , \text{ft} \times 9 , \text{ft} = 90 , \text{ft}^2 \]
Thus, the area of the parallelogram is:
\[ \text{Area} = 90 , \text{ft}^2 \]