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Pp = 3*4 = 12
Pb = 2*4*10+2*3*10 = 80 + 60 = 140
Pc = 2*12 + 140 = 24+140 = 164 cm^2
b) sześcian ma 12 krawędzi, więc:
216:12 = 18 cm - długość krawędzi
P = 6a^2
P = 6*18^2 = 6*324 = 1944 cm^2
P=3cm*4cm+4cm*10cm+10cm*3cm=12+40+30=82 cm2
b)216:12=18
P=a*a*6
P=18cm*18cm*6=324*6=1944cm2
P₁=a×b=3×10=30 cm²
P₂=a×b=4×10=40 cm²
P₃=a×b=4×3=12 cm²
Pc=2×30+2×40+2×12=60+80+24=164cm²
b)Pc=?
Pc=6×a²
a=216÷12=18 cm
Pc=6×18²=6×324=1944cm²