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x² + 3² = 4²
x² = 16-9
x²=7
x=√7
Odp.D :)
3² + b² = 4²
9 + b² = 16
b² = 16 - 9
b² = 7
b = √7 (pierwiastek z siedmiu)
Prawidłowa odpowiedź - d)
twierdzenie pitagorasa - a^2+b^2=c^2
a=3
b=x
c=4
3^2+x^2=4^2
9+x^2=16
x^2=16-9
x^2=7 /*√
x=√7
czyli odpowiedz d.