Odpowiedź:
[tex]P = \frac{abc}{4R}[/tex]
4R *P = abc
[tex]R = \frac{abc}{4P}[/tex]
[tex]R = \frac{5*7*8}{4*(10\sqrt{3})}[/tex]
[tex]R = \frac{280}{40\sqrt{3}}[/tex]
[tex]R = \frac{7}{\sqrt{3}}*\frac{\sqrt{3}}{\sqrt{3}}[/tex]
[tex]R = \frac{7\sqrt{3}}{3} = \frac{7}{3}\sqrt{3}[/tex]
