5.
Ppb:
2cm * 5cm = 10cm2
5cm * 5cm = 25cm2
2,5cm * 5cm = 12,5cm2
3,5cm * 5cm = 17,5cm2
Ppb = 10cm2 + 25cm2 + 12,5cm2 + 17,5cm2 = 65cm2
Pp = (5cm + 3,5cm) * 2cm / 2 = 8,5cm2
Ppc = 65cm2 + 2 * 8,5cm2 = 82cm2
6.
a)
Pp = 5cm * 2cm = 10cm2
Ppb:
5cm * 5cm * 2 = 50cm2
2cm * 5cm * 2 = 20cm2
Ppb = 50cm2 + 20cm2 = 70cm2
Ppc = 70cm2 + 2 * 10cm2 = 90cm2
b)
Pp = 3cm * 4cm / 2 = 6cm2
Ppb:
4cm * 5cm = 20cm2
4cm * 4cm = 16cm2
4cm * 3cm = 12cm2
Ppc = 20cm2 + 16cm2 + 12cm2 + 2 * 6cm2 = 60cm2
c)
Pp = 4dm * 2dm = 8dm2
Ppb:
4dm * 6dm * 2 = 48dm2
3dm * 6dm * 2 = 36dm2
Ppc = 48dm2 + 36dm2 + 2 * 8dm2 = 100dm2
