Odpowiedzi

2010-01-12T13:46:57+01:00
Pc=2Pp+Pb
Pp=a²=[(5,2cm)]²=27,04cm²
Pb=4*h*a=4*5,2cm*8,1cm=168,48cm²

Pc=2*27,04cm²+168,48cm²=222,56cm²
2010-01-12T13:47:49+01:00
Pp=a²=(5,2cm)²= 27,04cm²
Pb=4*h*a=4*5,2cm*8,1cm=168,48cm²

Pc = 2Pp + Pb = 2*27,04cm² + 168,48cm² =54,08cm² + 168,48cm² =
= 222,56cm²
2010-01-12T13:53:19+01:00
A=5,2 cm
h=8,1cm

Pc= (a²) *2 + 4*(a*h)
Pc=27,04*2+4*(5,2*8,1)
Pc=54,08+ 4*42.12
Pc=54,08+168,48
Pc=222,56 cm²