Răspuns:
[tex]\boldsymbol{AB = \red{ 5 } \ u}[/tex]
[tex]\boldsymbol{BC = \red{5\sqrt{2}} \ u}[/tex]
[tex]\boldsymbol{AC = \red{5} \ u}[/tex]
Explicație pas cu pas:
[tex]AB = \sqrt{3^2+4^2} = \sqrt{25} = 5 \ u[/tex]
[tex]BC = \sqrt{7^2+1^2} = \sqrt{49+1} = \sqrt{50} = 5\sqrt{2} \ u[/tex]
[tex]AC = \sqrt{4^2+3^2} = \sqrt{25} = 5 \ u[/tex]
