Pole podstawy
[tex] \frac{5 \times 12}{2} = 5 \times 6 = 30 {cm}^{2} [/tex]
Pole ścian bocznych
P1
[tex]5 \times 4 = 20 {cm}^{2} [/tex]
P2
[tex]12 \times 4 = 48 {cm}^{2} [/tex]
P3
[tex]13 \times 4 = 52 {cm}^{2} [/tex]
Pole całkowite
[tex]Pc = 30 {cm}^{2} + 20 {cm}^{2} + 48 {cm}^{2} + 52 {cm}^{2} = 50 {cm}^{2} + 100 {cm}^{2} = \underline{ 150 {cm}^{2} }[/tex]
