1.2. - podstawa - wysokość
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1.
![x-[(x-18) +0,40(x-18)]=x-1,4(x-18) x-[(x-18) +0,40(x-18)]=x-1,4(x-18)](https://tex.z-dn.net/?f=x-%5B%28x-18%29+%2B0%2C40%28x-18%29%5D%3Dx-1%2C4%28x-18%29)
- podstawa
- wysokość



2.