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d1=12
d2=8
pole = (8*12)/2=48
a-12cm
a-(33.5%z 12)=b
szukane
b+?
12-100%
x-33.5%
4.02
b=12-4.08
b=7.98
Pole rombu
½×a×b
=½×95,76
=47,88[cm²]
Obwód rombu
4*a
7.98*4
=31.92[cm]