The angle of a sector of a circle is 0.9 radians. If the radius of
FURTHER MATHEMATICS
WAEC 2012
The angle of a sector of a circle is 0.9 radians. If the radius of the circle is 4cm, find the length of the arc of the sector.
- A. 3.6 cm
- B. 7.6 cm
- C. 8.0 cm
- D. 11.6 cm
Correct Answer: A. 3.6 cm
Explanation
Length of arc given angle in radians = \(r \theta\)
= \(4 \times 0.9 = 3.6 cm\)
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