Odpowiedź:
a) P₁ = 1cm * 3cm = 3cm²
P₂ = 1cm * 4cm = 4cm²
Pc = P₁ + P₂
Pc = 4cm² + 3cm² = 7cm²
b)
P₁ = 2 * 8 = 16 [cm²]
P₂ = (9-2) * 2 = 7 * 2 = 14 [cm²]
Pc = 16 + 14 = 30 [cm²]
