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xkwadrat = 34
x= 5,831
z Pitagorasa
3^+5^=x^
9+25=x^
x^=34
x= pierwiastek z 34 więc niecałe 6
odp.b
^ to kwadrat
(8cm-3cm)^2 + 3^2 = x^2
25cm^2+9cm^2=x^2
34cm^2 = x^2
x = pierwiastek z 36
więc poprawna bd. odp. b)około 6cm