Wzór
[tex] \frac{a \times h}{2} [/tex]
a)
[tex] \frac{4 \times 0.5}{2} = 2 \times 0.5 = 1[/tex]
b)
[tex] \frac{6 \times 4}{2} = 6 \times 2 = 12[/tex]
