Odpowiedź:
sześcian
1 2/10cm=1,2cm
V=a^3
V=[tex](1.2cm) ^{3} = 1.728 {cm}^{3} [/tex]
Pc=[tex]6 {a}^{2} [/tex]
Pc=[tex]6 \times (1.2cm) ^{2} = 6 \times 1.44 {cm}^{2} = 8.64 {cm}^{2} [/tex]
prostopadłościan
1dm=10cm
V=abc
V=[tex]2cm \times 10cm \times 5cm = 100 {cm}^{3} [/tex]
Pc=2ab+2ac+2bc
Pc=[tex]2 \times 2cm \times 10cm + 2 \times 2cm \times 5cm + 2 \times 10cm \times 5cm = 40 {cm}^{2} + 20 {cm}^{2} + 100 {cm}^{2} = 160 {cm}^{2} [/tex]
