To find the area of a circle, you can use the formula:
\[ \text{Area} = \pi r^2 \]
where \( r \) is the radius of the circle. The radius is half of the diameter. Given that the diameter is 10 ft, the radius will be:
\[ r = \frac{10}{2} = 5 \text{ ft} \]
Now, plug the radius into the area formula:
\[ \text{Area} = \pi (5)^2 = \pi \times 25 \]
Now, using \( \pi \approx 3.14 \):
\[ \text{Area} \approx 3.14 \times 25 = 78.5 \]
Rounding to the nearest whole number, the area of the circle is:
\[ \text{Area} \approx 79 \text{ ft}^2 \]
So, the area of the circle is approximately 79 ft².