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45 stponi / 360 stopni = 1/8
1/8r = 1 / × 8
r= 8
b] 30 stponi / 360 stopni × π r² = 1/9π / ÷ π
1/12 r²= 1/9 / × 12
r²= 12/9
r= √12/9
r= 2√3 dzielone na 3
jakby co to sa ulamki np . 1/2
zadanioe napewno dobrze zrobione ; p