Question 32
Mensuration of Plane ShapesThe angle of a sector of a circle, radius 10.5cm, is 48°. Calculate the perimeter of the sector
- A.8.8cm
- B.25.4cm
- C.25.6cm
- D.29.8cm
Show the answer and explanation
Answer: D (29.8cm)
Explanation
Arc length = 48/360 × 2 × 22/7 × 10.5 = 8.8cm. Perimeter = arc + two radii = 8.8 + 21 = 29.8cm.