- A86
- B44
- C88
- D128
Step-by-Step Solution
Arc length = (120/360) × 2 × (22/7) × 21 = (1/3) × 132 = 44 cm. The perimeter also includes the two radii: 44 + 21 + 21 = 86 cm.
Answer: A) 86
Find the perimeter (in cm) of a sector of radius 21 cm whose central angle is 120°. Take π = 22/7.
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