Zadanie 1 :
P = a * h
a = 8 cm
h = 3 cm
P = 8 * 3 = 24 cm²
Zadanie 2 :
P = ½ * e * f
e = 4 cm
f = 4 cm + 2 cm = 6 cm
P = ½ * 4 * 6 = 2 * 6 = 12 cm²
Zadanie 3 :
P = ½ * a * h
a = 6 cm
h = 8 cm
P = ½ * 6 * 8 = 3 * 8 = 24 cm²
Zadanie 4 :
Podpunkt a)
P = a²
a = 8 cm
P = 8² = 64 cm²
Pole kwadratu o boku 8 cm wynosi 64 cm².
Podpunkt b)
P = a * b
9 * b = 45
b = 45 : 9
b = 5 cm
Pole prostokąta o bokach 9 cm i 5 cm wynosi 45 cm².
Zadanie 5 :
P = ½ * (a + b) * h
a = 4 cm
b = 4 cm + 5 cm = 9 cm
h = 8 cm
P = ½ * (4 + 9) * 8 = 4 * 13 = 52 cm²
