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90/360*K=36π cm² /*4
K=144π cm²
120/360 * 144π = Q
Q=144π*1/3
Q=48π cm²
Odp. A
Pwq - pole wycinka q
Musimy najpierw policzyć promień, czyli r
Pwp = /:
Pwp : = r²
r² = Pwp : =
r = 12
Pwq =