2004
Mathematics
JAMB
An arc of a circle of length 22 cm subtends an angle of 3x° at the center of the circle. Find the value of x if the diameter of the circle is 14 cm
A.
60°
B.
120°
C.
180°
D.
30°
Correct Answer: 60°
Explanation
ARClength=(θ/360) ×2πr. 22 = 3x/360 × (2× (22/7) × (7/1)). 3x=180. x=180/3 x=60∘
ARClength=(θ/360) ×2πr. 22 = 3x/360 × (2× (22/7) × (7/1)). 3x=180. x=180/3 x=60∘THIS WEEK's
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