Wzór:
[tex] \frac{a \times h}{2} [/tex]
a)
[tex] \frac{4 \times 2}{2} = \frac{8}{2} = 4[/tex]
b)
[tex] \frac{3 \times 2}{2} = \frac{6}{2} = 3[/tex]
c)
[tex] \frac{3 \times 4}{2} = \frac{12}{2} = 6[/tex]
