Question Number 183815 by AROUNAMoussa last updated on 30/Dec/22
Answered by mnjuly1970 last updated on 30/Dec/22
$$\:\:\:\:{r}_{{l}} \:−{r}_{{s}} =\:\mathrm{5} \\ $$$$\:\:\:\:\:{r}_{{l}} \:+{r}_{{s}} =\mathrm{13} \\ $$$$\:\:\:\:\:{r}_{\:{l}} =\mathrm{9}\:\:\:,\:\:{r}_{\:{s}} =\mathrm{4} \\ $$$$\:\:\:\:\:\:{s}=\:\pi{r}_{{l}} ^{\:\mathrm{2}} =\:\mathrm{81}\pi \\ $$
Commented by AROUNAMoussa last updated on 30/Dec/22
Explication, s'il te plaît !
Commented by JDamian last updated on 30/Dec/22
$$\left({r}_{{l}} −{r}_{{s}} \right)^{\mathrm{2}} +\mathrm{12}^{\mathrm{2}} =\mathrm{13}^{\mathrm{2}} \\ $$$$\left({r}_{{l}} −{r}_{{s}} \right)^{\mathrm{2}} =\mathrm{25} \\ $$$${r}_{{l}} −{r}_{{s}} =\mathrm{5} \\ $$
Commented by AROUNAMoussa last updated on 30/Dec/22
Ok, ��