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1/2 = AOB/304,44 cm²
AOB = 304,44 cm²/2
AOB = 152,22 cm²
jawabannya yg c
304.44 = 120/360 * l.lingkaran
l.lingkaran = 101.48
luas Juring AOB = 60/360 * 101.48
= 16,9133
isinya gak ada disitu