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r = 14 cm
Sudut AOB = 60°
a) panjang busur AB
= (sudut AOB / 360° ) × keliling lingkaran (2πr)
= (60°/360°) × (2 × 22/7 × 14)
= 1/6 × 88
= 14,67 cm
b) luas juring AOB
= (60°/360°) × luas lingkaran (πr²)
= 1/6 × (22/7 × 14²)
= 1/6 × 616
= 102, 67 cm²