| W^gZYMA^ŚĆMAT^RIAtó^^
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A =5 + 8 + 18 = 31 cm2 A1 = 1/2 A = 15.5 cm2 A1=5 + 8 + 9h = 15.5 h = 0.28
= 5x10.5 + 8x6 +18x1 = 118.5 cm3 zc = 3.82 cm a| Wpl — Sy0(Aj) - Syo(A2) — [5x8.78 + 8x4.28 +
J 9x0.28x0.28/2J-[9xl. 72x(- 1.72/2)]=91.8 cm3
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