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D=przekątna szescianu
D=a√3
d= przekatna sciany
d=a√2
a)18cm:12=1,5cm=a
D=1,5√3cm
d=1,5√2cm
b)126mm:12=10.5mm=a
D=10,5√3mm
d=10,5√2mm
c)6:12=0,5dm=a
D=0,5√3dm
d=0,5√2dm
d)12√2:12=√2=a
D=√2√3=√6
d=√2√2=2