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d-przekatna kwadratu
d=2r
d=2*6=12
d=a√2
12=a√2
a=12/√2
a=6√2
r=6
r=a√2/2
a wiec a =3√2
Zad.2
r=3
r=2*1/3*a√3/2
3=a√3/3 /*3
9=a√3 /:√3
9/√3=a
3√3=a
Zad.3
h=3=a√3/4
r=1/3*3
h=1