Sector Slice · Foundation / Core
A sector has radius 9 cm and angle 40°. Find its arc length and its area.
- 40/360 = 1/9 of the circle
- Arc length = 1/9 × 2 × π × 9 = 2π = 6.28 cm (3 s.f.)
- Area = 1/9 × π × 9² = 9π = 28.3 cm² (3 s.f.)
Answer: arc 6.28 cm, area 28.3 cm²