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a=0,2m
Pp=a²=0,2²=0,04
h=wysokosc
v=Pph
0,4=0,04h
h=0,4:0,04=10
6]
a=3cm
Pp=a²=3²=9
pbwód podstawy=4a=4*3=12
H=12
v=1/3*9*12=36cm³
7]
kula
R=12cm
r=6cm=promień
v=4/3πr³=4/3π*6³=288π
stozek
r=4
h=6
V=1/3πr²h=1/3π*4²*6=32π
ilosc stozków=288π;32π=9
8]
h=6√3
z kąta 30* wiesz, ze
tworzaca l=2h=12√3
promień r=6√3√3=18
Pc=πr²+πrl=π*18²+π*18*12√3=324π+216π√3=108π(3+2√3)j.²
9]
d=7√2=h√2
h=7
2r=7
r=3,5
Pp=πr²=π*3,5²=12,25π
Pb=2πrh=2π*3,5*7=49π
Pc=2*12,25π+49π=73,5πj.²