Jawabanmu

2014-04-11T21:23:28+07:00
Luas juring OBC=60/80 x 100
                       =6000/80
                       =75 cm2
Jawaban paling cerdas!
2014-04-11T21:25:26+07:00
100=80/360 x luas ling
100x360/80 = luas ling
450 = luas ling

luas jring OBC = 60/360 x 450
luas jring OBC = 75
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