Question 1134535


 the area of a circle:{{{A=r^2*pi}}}

and circumference of a circle:{{{C=2r*pi}}}

if {{{r=6m}}}, we have

{{{A=(6m)^2*pi}}}

{{{A=36m^2*pi}}}-> exact area

{{{A=36m^2*3.14}}}

{{{A=113.04m^2}}}-> approximate area


{{{C=2(6m)*pi}}}

{{{C=12m*pi}}}-> exact circumference

{{{C=12m*3.14}}}

{{{C=37.68m}}}-> approximate circumference