Odpowiedź :
x - szukany bok
a)
[tex] {9}^{2} + {12}^{2} = {x}^{2} \\ 81 + 144 = {x}^{2} \\ {x}^{2} = 225 \\ x = \sqrt{225} = 15[/tex]
b)
[tex] {5}^{2} + {3}^{2} = {x}^{2} \\ 25 + 9 = {x}^{2} \\ {x}^{2} = 34 \\ x = \sqrt{34} [/tex]
c)
[tex] {6}^{2} + {x}^{2} = {10}^{2} \\ 36 + {x}^{2} = 100 \\ {x}^{2} = 64 \\ x = \sqrt{64} = 8[/tex]
Myślę że pomogłem ;)