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P=3x4:2= 6cm²
P=6x5:2= 15cm²
P=4x8:2=16cm²
P=5x3.3≈16,5cm²
Obw!!!
0,5*6cm*5cm* 5cm=75 cm(kwadratowych)
05*4cm*8cm*8cm=128cm(kwadratowych)
o,5*5cm* (pierwiastek z 11 cm)* 6cm=(nie wiem)