Question 8118
Area of a circle is {{{A=(pi)r^2}}}

{{{Pi}}}={{{3.14}}} or {{{22/7}}}

The radius is half of the diameter

Circumference of a circle is{{{C=(pi)d}}} or {{{2(pi)r^2}}}

A=(3.14)(2.5)=7.85
C=(3.14)(5)=15.7

I hope that helps you