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Pole pros. 1=300cm²
Pole pros. 2= 6cm×8cm=48cm²
skala= √300cm²:48cm²=2.5
czyli:
6cm×2.5=15cm
8cm×2.5=20cm
x=15cm+15cm+20cm+20cm
x=70cm
2)Obw pros 1=x
Pole pros 1=240cm²
Pole pros 2= 3cm×5cm=15cm²
skala=√240cm²:15cm²=4
czyli:
3cm×4=12cm
5cm×4=20cm
x=12cm+12cm+20cm+20cm=64cm