P = 2ab + 2bc + ac
a) 2*4*7 + 2*7*2 + 2*4*2 = 56+ 28+16 = 100
c) 2*11*11 + 2*11*11 + 2*11*11= 726
Odpowiedź:
Szczegółowe wyjaśnienie:
A) Pc=2*Pp+Pb
Pp=3,5cm*2cm=7cm²
Pb=2cm*4,5cm*2+3,5cm*4,5cm*2 =18cm²+31,5cm²=49,5cm²
Pc=2*7cm²+49,5cm²=14cm²+49,5cm²=63,5cm²
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P = 2ab + 2bc + ac
a) 2*4*7 + 2*7*2 + 2*4*2 = 56+ 28+16 = 100
c) 2*11*11 + 2*11*11 + 2*11*11= 726
Odpowiedź:
Szczegółowe wyjaśnienie:
A) Pc=2*Pp+Pb
Pp=3,5cm*2cm=7cm²
Pb=2cm*4,5cm*2+3,5cm*4,5cm*2 =18cm²+31,5cm²=49,5cm²
Pc=2*7cm²+49,5cm²=14cm²+49,5cm²=63,5cm²