obliczz dok. do 0,1cm dlugosc okregu o srednicy a4cm b5/2 d21,6
a) d=4 cm
O=pi*d
O=3,14*4
O=12,6 cm
b) d=5/2 cm
O=3,14*5/2
O=7,9 cm
c) d=21,6 cm
O=3,14*21,6
O=67,8 cm
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a) d=4 cm
O=pi*d
O=3,14*4
O=12,6 cm
b) d=5/2 cm
O=pi*d
O=3,14*5/2
O=7,9 cm
c) d=21,6 cm
O=pi*d
O=3,14*21,6
O=67,8 cm