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a3=27cm3
a=3
Pc=6*a2=6*9=54cm2
2.
Pc=2ab+2ac+2bc=2*30+2*15+2*18=126cm2
∛27=3
a=3
p=6*a²
p=6*3²
p=6*9
p=54cm²
2)
p=2*ab+2*ac+2*bc
p=2*5*6+2*5*3+2*6*3
p=2*30+2*15+2*18
p=60+30+36
p=126cm²
proszę ;)