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6 cm - b
8 cm - c
P=ab+ac+bc
P=4,5*6+4,5*8+6*8
P=27+36+48
P=111cm²
Pole powierzchni tego prostopadłościanu wynosi 111cm².
4,5*8=36
6*8=48
2*(27+36+48)=2*111=222
Pśb=4,5cm×8cm×2+6cm×8cm=168cm²
Pc=27cm²×2+168cm²=222cm²