Jawabanmu

2014-05-10T11:02:09+07:00
Phi . r.r
3,14 . 14.14
=615,44 cm2
Komentar sudah dihapus
bro 22/7 sama 3,14 itu sama
2014-05-10T11:04:38+07:00
L =  π r²
   =  22/7 . 14²
   =  22 . 28
   = 616 cm²