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p=2(6*5)+2(5*8)+2(6*8)=60+80+96=236 cm^2
2,5 x 8 x 6
p=2(2,5*8)+2(8*6)+2(2,5*6)=40+96+30=166 cm^2
b=5 cm.
c=8 cm.
Pc=2ab+2ac+2bc
Pc=2*6*5+2*6*8+2*5*8
Pc=60+96+80
Pc=236 cm²
Mam nadzieję, że nie nachrzaniłam :D
6*8=48 48*2=96
5*8=40 40*2=80
60+96+80=236
(2,5*8)*2=40
2,5*6*2=30
8*6*2=96
96+30+40=166