You just said it ourself: 6cm.
But if 6cm is the radius, then our formula is $${\mathtt{\pi}}{\mathtt{\,\times\,}}{{\mathtt{r}}}^{{\mathtt{2}}}$$, r being the radius.
You just said it ourself: 6cm.
But if 6cm is the radius, then our formula is $${\mathtt{\pi}}{\mathtt{\,\times\,}}{{\mathtt{r}}}^{{\mathtt{2}}}$$, r being the radius.