#### Answer

The area is 0.25$\pi$ yard ssquared.

#### Work Step by Step

The formula for the area of a circle is $\pi$ $\times$ $r^{2}$
The diameter is twice the radius.
So: d = 2r
1 = 2r
r = 0.5
Substitute 0.5 for r to obtain:
A = $\pi$ $\times$ $0.5^{2}$
A = $\pi$ $\times$ 0.25
A = 0.25$\pi$