Oblicz pole koła o promieniu- podaj dokładny wynik .
a)2 i 1/3 km
r=2 1/3km=7/3km
P=pir^2
P=(7/3)^2*pi=49/9*pi
pi=3,14
P=3,14*49/9=153,86/9=17 86/900=17 43/450 km^2 (km^2 - km kwadratowy0
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r=2 1/3km=7/3km
P=pir^2
P=(7/3)^2*pi=49/9*pi
pi=3,14
P=3,14*49/9=153,86/9=17 86/900=17 43/450 km^2 (km^2 - km kwadratowy0