Odpowiedź:
P = a * b /a
b = [tex]\frac{P}{a}[/tex]
a)
P = 60 dm²
a = 12 dm
b = [tex]\frac{60}{12}[/tex] = 5 dm
b)
P = 147 m²
a = 7 m
b = [tex]\frac{147}{7}[/tex] = 21 m
c)
P = 48 cm²
a = 80 mm = 8 cm
b = [tex]\frac{48}{8}[/tex] = 6 cm
d)
P = 4400 cm² = 44 dm²
a = 11 dm
b = [tex]\frac{44}{11}[/tex] = 4 dm
