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a) Pc= 6×(8)²
Pc= 6×64
Pc=384
b) Pc=6×(10)²
Pc=6×100
Pc=600
a)4cm x 3cm x 6cm
Pc=2ab+2bc+2ac
Pc=2x4x3+2x3x6+2x4x6
Pc=24+36+48
Pc=108
b)7dm x 7dm x 5dm
Pc=2x7x7+2x7x5+2x7x5
Pc=98+70+70
Pc=238
c)12cm x 3cm x 9cm
Pc=2x12x3+2x12x9+2x3x9
Pc=72+216+54
Pc=342
d) 4m x 2 dm 8dm
Pc=2x4x2+2x4x8+2x2x8
Pc=16+64+32
Pc=112