Question 14
Mensuration of Plane ShapesA sector of a circle with radius 6 cm subtends an angle of 60° at the centre. Calculate its perimeter in terms of π.
- A.2(π + 6) cm
- B.2(π + 3) cm
- C.2(π + 2) cm
- D.(π + 12) cm
Show the answer and explanation
Answer: A (2(π + 6) cm)
Explanation
Arc = 60/360 × 2π × 6 = 2π. Perimeter = 6 + 6 + 2π = 2(π + 6) cm.