Odpowiedź :
[tex]x^2=7^2+6^2\\x^2=49+36\\x^2=85\\x=\sqrt{85}[/tex]
[tex]y^2=9^2+5^2\\y^2=81+25\\y^2=106\\y=\sqrt{106}[/tex]
[tex]z^2=3^2+2^2\\z^2=9+4\\z^2=13\\z=\sqrt{13}[/tex]
[tex]Obw=\sqrt{85}+\sqrt{106}+\sqrt{13}[/tex]

[tex]x^2=7^2+6^2\\x^2=49+36\\x^2=85\\x=\sqrt{85}[/tex]
[tex]y^2=9^2+5^2\\y^2=81+25\\y^2=106\\y=\sqrt{106}[/tex]
[tex]z^2=3^2+2^2\\z^2=9+4\\z^2=13\\z=\sqrt{13}[/tex]
[tex]Obw=\sqrt{85}+\sqrt{106}+\sqrt{13}[/tex]