Answer:
314 yd²
Explanation:
You want the area of a circle that has a diameter of 20 yards.
Area formula
The usual formula for the area of a circle is ...
A = πr² . . . . . . where r is the radius
The radius of the circle is half the diameter, so is (1/2)(20 yd) = 10 yd.
Using this value in the formula, we find the area to be ...
A = 3.14(10 yd)² = 314 yd²