Odpowiedź:
z tw.pit.
[tex] {12}^{2} + {5}^{2} = {x}^{2} [/tex]
[tex] {x}^{2} = 144 + 25[/tex]
[tex] {x}^{2} = 169[/tex]
[tex]x = 13(m)[/tex]
[tex]13m = 1300cm[/tex]
[tex]1300cm \div 20cm = 65cm[/tex]
