Chapter 1 - Tools of Geometry - 1-8 Perimeter, Circumference, and Area - Practice and Problem-Solving Exercises - Page 65: 25

$9.9225\pi ft^2$

To find the area of a circle, we use the formula $A=\pi r^2$ The circle shown has a diameter of 6.3 ft, so its radius is half of that, or 3.15 ft. We plug this value into the formula and simplify: $A=\pi (3.15)^2=\pi\times9.9225=9.9225\pi\ ft^2$