Jawabanmu

2014-05-31T14:56:24+07:00
12)   Luas juring AOB/Luas juring BOC = AOB/BOC
       = 18 cm²/luas juring BOC = 90°/120°
       = 18 X 120 = 90 X Luas Juring BOC ( kali silang)
       = 2160 = 90 X Luas juring BOC
       = 90
° X Luas juring BOC = 2160 
       = Luas juring BOC = 2160/90
       = 24 (jawaban C)

13)  P.Busur KL/P.busur MN = KPL/MPN
      = 30/MN = 45/75
      = 30 X 75 = 45 X P.busur MN (kali silang)
      = 2250 = 45 X P.busur MN
      = P.busur MN = 2250/45
      = 50 (jawaban D)



no 14

ACB = 1/2 DARI AOB
ACB = 1/2 80
ACB= 40 (jawaban B)