V=Pp* H("*"to znaczy mnożenie)
Pc = 2Pp + Pb
Rys. 1 :
H=9 cm
Pp= a*h/2 = 10*6/2 = 60/2 =30 cm2
V= 30*9= 270 cm3
Pp= 30 cm2
Pb= P1 + P2 + P3 (pokazane na zdjęciu)
P1= a*b = 6*9 =54 cm2
P2=a*b= 8*9 = 72 cm2
P3=a*b=9*10=90 cm2
Pb= 54+72+90= 216 cm2
Pc= 2*30 + 216 = 276 cm2
Dane do wpisania:
V= 270 cm3
Pp= 30 cm2
Pb= 216 cm2
Pc= 276cm2
Rys.2:
H= 12 cm
Pp= (a+b)*h/2 = (7+13)*4/2 = 20*4/2 = 80/2 = 40 cm2
V= 40*12=480 cm3
Pp=40cm2
Pb=P1+2P2 + P3
P1=a*b = 12*13=156cm2
P2=a*b=12*5=60 cm2
P3=a*b =7*12=84 cm2
Pb= 156+2*60+84=156+120+84=360 cm2
Pc=2*40+360=440 cm2
Dane do wpisania:
V=480cm3
Pp=40cm2
Pb=360cm2
Pc=440cm2
