Odpowiedź:
a = 9 cm
b = 3 cm
c = 10 cm
h = 8 cm
H = 5 cm
[tex]P_p=\frac{a+b}{2}\cdot h= \frac{9cm+3cm}{2}\cdot8=\frac{12cm}{2}\cdot8cm=6cm\cdot8cm=48\ cm^2[/tex]
P₁ = h · H = 8 cm · 5 cm = 40 cm²
P₂ = a · H = 9 cm · 5 cm = 45 cm²
P₃ = c · H = 10 cm · 5 cm = 50 cm²
P₄ = b · H = 3 cm · 5 cm = 15 cm²
Pb = P₁ + P₂ + P₃ + P₄
Pb = 40 cm² + 45 cm² + 50 cm² + 15 cm² = 150 cm²
Pc = 2 · Pp + Pb
Pc = 2 · 48 cm² + 150 cm² = 96 cm² + 150 cm² = 246 cm²
