Question 18
Mensuration of Plane ShapesAn arc of a circle radius 7cm is 14cm long. What angle does the arc subtend at the centre of circle? (Take π = 22/7)
- A.25.7°
- B.44°
- C.51.43°
- D.98°
- E.114.55°
Show the answer and explanation
Answer: E (114.55°)
Explanation
θ/360 × 2 × 22/7 × 7 = 14, so θ/360 × 44 = 14 and θ = 14/44 × 360 = 114.55°.