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Pb = 4 × 7cm × 12cm
Pb = 336cm²
Pc = 336cm² + 49cm² × 2 = 434cm²
a=7
a-kr.podstawy
Pp=a²
Pp=7²
Pp=49
Pbocznej=?
b=12
b-kr. boczna
a-kr podstawy
Pb=4*12*7
Pb=336
Pc=2*Pp+Pb
Pc=2*49+366
Pc=464
Pb = 7cm x 12cm x 4 = 336cm²
Pc = 336cm² + 49 cm² x 2 = 434cm²