Odpowiedź:
a)
Pp = 4cm * 6cm
Pp = 24 cm^2
Pb = 2*(8cm*6cm)+2*(4cm*6cm) = 2 * 48cm^2 + 2 * 24 cm^2
Pb = 96cm^2 + 48cm^2 = 144cm^2
Pc = 2*Pp + Pb
Pc = 48cm^2 + 144cm^2
Pc = 192cm^2
b)
Pp = 1/2 * 3cm * 4cm
Pp = 6cm^2
Pb = 5cm*6cm+3cm*6cm+4cm*6cm = 30cm^2 + 18cm^2 + 24cm^2
Pb = 72cm^2
Pc = 12cm^2 + 72cm^2
Pc = 84cm^2
c)
Pp = 5cm+7cm * 1/2 * 2cm
Pp = 12cm^2
Pb = 5cm*6cm + 7cm*6cm+ 2*(3cm*6cm)
Pb = 30cm^2 + 42cm^2 + 36cm^2
Pb = 108cm^2
Pc = 24cm^2 + 108cm^2
Pc = 132cm^2
