Find the perimeter of a sector of a circle with radius 14 cm and central angle 90°. (Use pi = 22/7)
A22 cm
B36 cm
C50 cm
D64 cm
Explanation
Arc length = (90/360) * 2 * (22/7) * 14 = (1/4) * 88 = 22 cm. Perimeter of sector = Arc length + 2 * radius = 22 + 2(14) = 22 + 28 = 50 cm.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Sector of Circle
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