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r=75cm
α=?
L=α/360·2πr
94,2=α/360·2·π·75
94,2=150πα/360
94,2=2,4π·α
94,2=2,4·3,14·α
94,2=7,536·α
α=94,2:7,536
α=12,5°---->miara kata srodkowego