6.
Pole całkowite:
[tex] \frac{8 \times 6}{2} \times 2 + 7 \times 10 + 7 \times 6 + 7 \times 8 = 48 + 70 + 42 + 56 = 216[/tex]
Objętość:
[tex] \frac{6 \times 8}{2} \times 7 = 24 \times 7 = 168[/tex]
7.
[tex]2p = (c + d) \times h \\ \frac{2p}{h} = c + d \\ d = \frac{2p}{h} - c[/tex]
czyli odpowiedź D