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nilai x = 30
B)
<AOB = 180 - (30 + 30)
= 180 - 60
= 120
C)
sudut keliling = 1/2 sudut pusat
= 1/2/ 120
= 60
karena segitiga AOB adalah segitiga sama kaki maka nilai x = 30°
b.)
besar sudut AOB
< AOB = 180° - (30° + 30°)
< AOB = 180° - 60°
< AOB = 120°
c. )
besar sudut keliling ACB
< AOB : 2
120° : 2
60°
karena menghadap busur yang sama
moga moga betul,,,