Răspuns :
Am atasat rezolvarea Spor se imparte la 2 tot pt ca avem jumatati sus si jos
r=6/6=1cm
Ï€=3
x=Ï€ r^2/2=3/2 cm
y=Ï€ 4r^2/2 - x=6 - 3/2=9/2 cm
aria gri=2y=9 cm
Ï€=3
x=Ï€ r^2/2=3/2 cm
y=Ï€ 4r^2/2 - x=6 - 3/2=9/2 cm
aria gri=2y=9 cm