Odpowiedź :
[tex]P_{p} = 12 \ cm^{2}\\H = 20 \ cm\\\\V = \frac{1}{3}\cdot P_{p}\cdot H\\\\V = \frac{1}{3}\cdot12 \ cm^{2}\cdot20 \ cm = 80 \ cm^{3}[/tex]
[tex]P_{p} = 12 \ cm^{2}\\H = 20 \ cm\\\\V = \frac{1}{3}\cdot P_{p}\cdot H\\\\V = \frac{1}{3}\cdot12 \ cm^{2}\cdot20 \ cm = 80 \ cm^{3}[/tex]