Question Number 68092 by TawaTawa last updated on 04/Sep/19
Commented by TawaTawa last updated on 05/Sep/19
$$\mathrm{I}\:\mathrm{understand}\:\mathrm{very}\:\mathrm{well}\:\mathrm{now}\:\mathrm{sir}. \\ $$
Commented by kaivan.ahmadi last updated on 04/Sep/19
$${P}=\mathrm{16}\pi=\mathrm{2}\pi{r}\Rightarrow{r}=\mathrm{8} \\ $$
Commented by TawaTawa last updated on 04/Sep/19
$$\mathrm{Sir},\:\mathrm{why}\:\mathrm{is}\:\:\mathrm{16}\pi\:=\:\mathrm{2}\pi\mathrm{r}.\:\:\mathrm{Thanks}\:\mathrm{sir}.\:\mathrm{God}\:\mathrm{bless}\:\mathrm{you}. \\ $$
Commented by kaivan.ahmadi last updated on 05/Sep/19
$$\mathrm{12}\pi\:{is}\:\:{the}\:{piramid}\:{of}\:{the}\:{circle} \\ $$$$\mathrm{2}\pi{r}\:{is}\:{the}\:{formula}\:{of}\:{the}\:{piramid}\:{of}\:{circle} \\ $$$$ \\ $$