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1)
![l=2pi r=2*3,14*2=12,56 l=2pi r=2*3,14*2=12,56](https://tex.z-dn.net/?f=l%3D2pi+r%3D2%2A3%2C14%2A2%3D12%2C56)
2)
![l=2pi rl=pi d=3,14*2=6,28 l=2pi rl=pi d=3,14*2=6,28](https://tex.z-dn.net/?f=l%3D2pi+rl%3Dpi+d%3D3%2C14%2A2%3D6%2C28)
3)
![l=2pi rl=pi d=3,14*5=15,7 l=2pi rl=pi d=3,14*5=15,7](https://tex.z-dn.net/?f=l%3D2pi+rl%3Dpi+d%3D3%2C14%2A5%3D15%2C7)
4)
![l=2pi r l=2pi r](https://tex.z-dn.net/?f=l%3D2pi+r)
![r=frac{l}{2pi}=frac{6}{2*3}=1 r=frac{l}{2pi}=frac{6}{2*3}=1](https://tex.z-dn.net/?f=r%3Dfrac%7Bl%7D%7B2pi%7D%3Dfrac%7B6%7D%7B2%2A3%7D%3D1)
5)
![S= frac{pi}{d}*d^{2}=frac{3,14}{4}*4^{2}=0,785*16=12,56 S= frac{pi}{d}*d^{2}=frac{3,14}{4}*4^{2}=0,785*16=12,56](https://tex.z-dn.net/?f=S%3D+frac%7Bpi%7D%7Bd%7D%2Ad%5E%7B2%7D%3Dfrac%7B3%2C14%7D%7B4%7D%2A4%5E%7B2%7D%3D0%2C785%2A16%3D12%2C56)
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