Jawabanmu

2014-04-24T09:15:28+07:00
Kell = 2 × (22/7)/ (3,14) × r luas= (22/7)/(3,14) × r × r
2014-04-24T09:17:11+07:00
Keliling lingkara  ; 2πr
luas : π.r²