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P=a2
P= 1/3 2(kwadrat)
P= 1/9
2) Pp=3*4=12
Pb= 3*7.5+4*7.5+5*7.5=22,5+30+37.5=90
Pc=2*12+90 = 24+90= 114 ;)
a= ⅓
Pole sześcianu = 6 × a²
P= 6 × (⅓)²
P= ⅔
2
Pole podstawy = ½ * 3 * 4 = 6
pb₁ = 3*7,5 = 22,5
pb₂ = 4*7,5 = 30
pb₃ = 5*7,5 = 37,5
Pb= 22,5 + 30 + 37,5 = 90
Pc= 2*6cm² + 90cm
Pc= 102cm²
2.Pc=Pp+Pb
Pc=2*3*4+2*3*5=54
Pb=7,5*3+7,5*4+7,5*5=22,5+30+37,5=90