the diameter of a circle is 6 centimeters. What is the area?give the exact answer in simplest form.

SOLUTION
The diameter of the circle is 6cm
The area of a circle is given as
[tex]A=\pi r^2[/tex]The radius of the circle is
[tex]r=\frac{6}{2}=3[/tex]Therefore, the area of the circle is
[tex]A=\pi\times3^2^{}[/tex]This gives
[tex]\begin{gathered} A-9\pi \\ A=28.3 \end{gathered}[/tex]Therefore, the area of the circle is 28.3 cm²