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4x6=24
3x6=18
Pc=30+24+18=72 (cm kwadratowe)
Pp = ½ × 3cm × 4cm = 6cm²
Pc = 2× 6cm² + 72cm² = 84cm²
odp. Pole całkowite wynosi 84cm²
Pc = 12 + 12 × 6
Pc = 12 + 72
Pc = 84 cm ²