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44 = 2 . 22/7 .r
22 = 22/7 . r
r = 22 ÷ 22/7
r =22 x 7/22
r = 7 cm
luas= pi . r^2
Luas = 22/7 . 7^2
= 22/7 .49
= 154cm2
Pi.r=22
R=22.7/22
R=7
Luas= 22/7.7.7=154 cm^2