Question 1098104
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<U>It is more than obvious &nbsp;</U>that the radius of the inscribed circle is &nbsp;<U>HALF of the radius of the original circle</U>: &nbsp;&nbsp;r = {{{R/2}}}.



So, &nbsp;its circumference is  {{{2*pi*r}}} = {{{2*pi*(R/2)}}} = {{{pi*R}}} = 


= half of the circumference of the original circle.




Ignore the other solution, &nbsp;since it is &nbsp;&nbsp;<U>I N C O R R E C T</U>.