Odpowiedź:
P = a × h, P = (d1 × d2)/2 (w tym przypadku)
a) P = 4 × 5 = 20[tex]cm^{2}[/tex]
b) P = (12 × 6)/2 = 72/2 = 36[tex]cm^{2}[/tex]
c) P = 5 × 6 = 30[tex]cm^{2}[/tex]
d) P = (12 × 8)/2 = 96/2 = 48[tex]cm^{2}[/tex]
e) P = 9 × 3 = 27[tex]cm^{2}[/tex]
