Odpowiedzi

2009-11-29T15:13:56+01:00
Pt = 1/2 a*h = 1/2 5cm*12 cm = 30cm²

Pb₁ = 6,2 cm * 12cm = 74,4cm²
Pb₂ = 6,2 cm* 5cm = 31cm²
Pb₃ = 6,2 cm* 13 cm= 80,6 cm²

Pc= 2*Pt + Pb₁+Pb₂+Pb₃= 2*30cm²+31cm²+74,4cm²+80,6cm² = 246cm²