Odpowiedź:
1.
[tex]pp \: = \frac{5 \times 8}{2} = \frac{40}{2} = 20[/tex]
H= 13
V=
[tex]20 \times 13 = 260[/tex]
2.
[tex]2pp = 2 \times \frac{3 \times 4}{2} = 2 \times \frac{12}{2} = 12[/tex]
[tex]pb = 3 \times 6 + 4 \times 6 + 5 \times 6 = 18 + 24 + 30 = 72[/tex]
[tex]pc = 72 + 12 = 84[/tex]
