Analog procedam, trebuie sa-i aflam raza cercului circumscris triunghiului, dar ne cam incurca aria. Deci, aflam latura mai intai.
[tex]A_3= \frac{l^2 \sqrt{3} }{4} =\ \textgreater \ 25 \sqrt{3} * 4 = l^2 \sqrt{3 } =\ \textgreater \ l^2=25 * 4 =\ \textgreater \ l = 5 * 2 = 10 \ cm [/tex]
Acum, putem afla raza:
R = [tex] \frac{l \sqrt{3} }{3} [/tex] => R = [tex] \frac{10 \sqrt{3} }{3} [/tex] cm
Atunci:
Adisc = πR^2 = [tex] \frac{100*3\pi}{9} [/tex] = [tex] \frac{100\pi}{3} [/tex] cm2
Success!
