12
sudut AOB / sudut BOC = Juring AOB / Juring BOC
90 / 120 = 18 / x
90 x = 120 . 18
x = (120.18) / 90
x = 24
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13
sudut KPL / sudut MPN = Busur KL / Busur MN
45 / 75 = 30 / x
45 . x = 75 . 30
x = (75 . 30) / 45
x = 50
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14
sudut Pusat = 2 x Sudut keliling
sudut ACB = 1/2 . 80
sudut ACB = 40

Jawabanmu

2014-05-29T21:16:46+07:00
14) jawabannya 40, soalnya sudut AOB = 2 kali sudut ACB