Odpowiedź:
IV.
a)
P - pole = 5 cm * 3 cm = 15 cm²
b)
P = 1/2* (5 cm + 2 cm) * 4 cm = 1/2 * 7 cm * 4 cm = 7 cm * 2 cm = 14 cm²
c)
P = 1/2 * 12 cm * 5 cm = 6 cm * 5 cm = 30 cm²