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Obw: 5cm + 6cm + 5cm = 16cm
P: 5cm * 4,8 cm 2
———————- = 12cm
2
B)
P: 11,7cm * 7,2cm 2
———————— = 84,24cm
2
Obw: 11,7 + 7,5 + (tu dodaj trzeci bok)=