Odpowiedź :
[tex]pole \: trojkata = \frac{a \times h}{2} \\ \\ p1 = \frac{4 \times 20}{2} = 40cm {}^{2} \\ p2 = \frac{4 \times 8}{2} = 16cm {}^{2} \\ p3 = \frac{4 \times 2.3}{2} = 4.6cm {}^{2} \\ p4 = \frac{4 \times 14}{2} = 28cm {}^{2} [/tex]
[tex]pole \: trojkata = \frac{a \times h}{2} \\ \\ p1 = \frac{4 \times 20}{2} = 40cm {}^{2} \\ p2 = \frac{4 \times 8}{2} = 16cm {}^{2} \\ p3 = \frac{4 \times 2.3}{2} = 4.6cm {}^{2} \\ p4 = \frac{4 \times 14}{2} = 28cm {}^{2} [/tex]