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30⁰/360⁰×2πr=8π
1/12×2πr=8π
2/12r=8
r=48 cm
P=πr²
P=π×48²
P=2304π cm²
P =2304 ×3,14 cm² = 7234,56 cm²
długość okręgu---2πr
2πr=96π/:2π
r=48 cm
P=πr²
P=48²*π
P=2304π cm²