The these sides of a triangle of a triangle ABC are 8 cm,10 cm and 12 cm. These circles are drawn with centres A,B and C each one touching the other two. The radii of circles are ___________

Question

$\begin{array}{1 1}4\;cm,2\;cm,8\;cm\\5\;cm,3\;cm,7\;cm\\3 \;cm,7\;cm,8\;cm\\5\;cm,3\;cm,6\;cm \end{array} $