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sudut BOC = 150 derajat
Luas juring AOB = 26 cm2
Berapa luas lingkaran . . . ?
sudut AOB / 360 × Luas lingkaran = 26
120 / 360 × Luas lingkaran = 26
1/3 × Luas = 26
Luas lingkaran = 26 × 3
Luas lingkaran = 78 cm2
Jadi, luas lingkaran adalah 78 cm2