oblicz pole wycinka kołowego o promieniu 4 dm o kącie środkowym równym:
a) 45 stopni
b)120 stopni
c) 135 stopmi
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a) r=4 dm
α=45*
P w=(α/360*)πr²
P w=(45*/360*)π·16
P w=1/8·16π
Pw=2π dm²
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b) r=4 dm
α=120*
P w=(120*/360*)·16π
Pw=(1/3)·16 π
P w=16/3 π dm²
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c) r=4 dm
α=135*
P w=(135*/360*)·16 π
P w=(3/8)·16π
P w=6 π dm²
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