Answer
Area = 2.25$\pi$
The approximation of the area = 2.25 $\times$ 3.14 = 7.065
Work Step by Step
The area of a circle is: $\pi$ $\times$ $radius^{2}$
So, Area of the circle = $\pi$ $\times$ $r^{2}$
Since the diameter is 3, the radius is 1.5 (The radius is half the diameter)
Area = $\pi$ $\times$ $1.5^{2}$
Area = 2.25$\pi$
The approximation of the area = 2.25 $\times$ 3.14 = 7.065
