Pc= 2*Pp+Pb
a) Pp= 7*2=14 cm²
Pb= 2*7*10+2*2*10= 140+40=180cm²
Pc=2* 14+180=28+180=208 cm²
b) Pp= [tex]2 \times \frac{5x12}{2} = 5x12 = 60[/tex] cm²
Pb=a*H+b*H+c*H=5*10+12*10+13*10=50+120+130=300cm²
Pc= 60+300=360cm²
c) Pp=a*h=6*5=30cm²
Pb= 2*6*10+2*8*10= 120+160=280cm²
Pp= 2*30+280=60+280=340 cm²
d) Pp= [tex] \frac{12x16}{2} = 96[/tex] cm²
Pb=2*10*10+2*10*10= 200+200=400cm²
Pc= 2*96+400= 192+400=592 cm²
e) Pp = [tex] \frac{(2 + 6)x3}{2} = \frac{8x3}{2} = 4x3 = 12[/tex] cm²
Pb = P₁ + P₂ + P₃ + P₄
P₁ = 2 · 10 = 20cm²
P₂ = 6 · 10 = 60 cm²
P₃ = 3 · 10 = 30 cm²
P₄ = 5 · 10 = 50 cm²
Pb = 20 + 60 + 30 + 50 = 160 cm²
Pc = 2 · 12 + 160 = 24 + 160 = 184cm²
