3,5,x:
a²+b² = c²
3²+5² = c²
9+25 = 34
c = √34cm
6,x,15:
a²+b² = c²
c²-b² = a²
15²-6² = a²
225-36 = 189
a = √189 = √9*21 = 3√21cm
Cześć!
Zastosujemy tu twierdzenie Pitagorasa.
[tex] {a}^{2} + {b}^{2} = {c}^{2} [/tex]
[tex] {3}^{2} + {5}^{2} = {c}^{2} \\ 9 + 25 = {c}^{2} \\ 34 = {c}^{2} \\ \sqrt{34} = c \\ [/tex]
Pozdrawiam!