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a2 + b2 = c2
bok = 2
polowa przekatnej = 1
1*2 + b2 = 2*2
1 + b2 = 4
b2 = 4 - 1
b2 = 3
b = pierwiastek z trzech
b = ~~1,73
cala przekatna to 2b wiec 2 razy 1,73 =3,46
1*2- to jest jeden do kwadratu itd.