WAEC Mathematics 2025 Theory — Question 10
Question 10 of 19 from the West African Examinations Council (WAEC) Mathematics 2025 Theory paper, with the correct answer and a full explanation.
Advertisement
9(b). A sector of a circle of radius 6 cm subtends an angle of 105° at the centre. Calculate the: (i) perimeter; (ii) area of the sector. [Take π = 22/7]
Model answer
(i) Perimeter = (θ/360)×2πR + 2R = (105/360)×2×(22/7)×6 + 2×6 = 11 + 12 = 23 cm (ii) Area = (θ/360) × πR² = (105/360) × (22/7) × 36 = 33 cm²
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.