A sector of a circle of radius 7cm has an area of 44cm 2 .
MATHEMATICS
WAEC 1990
A sector of a circle of radius 7cm has an area of 44cm2. Calculate the angle of the sector correct to the nearest degree [Take π = 22/7]
- A. 6°
- B. 26°
- C. 52°
- D. 103°
Correct Answer: D. 103°
Explanation
πr2 = 360°
44cm2 = θ
θ = 44/πr2
x 360° = 102.9° = 103°
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