2016
Mathematics
JAMB
An arc of the length 16π cm subtends an angle of 80° at the centre of the circle. Find the radius of the circle.
A.
24cm
B.
28cm
C.
36cm
D.
32cm
Correct Answer: 36cm
Explanation
L = θ/360 x 2πr 16π = 80/360 x 2πr (16π × 360)/(80 × 2π) = r r = 36cm
L = θ/360 x 2πr 16π = 80/360 x 2πr (16π × 360)/(80 × 2π) = r r = 36cmTHIS WEEK's
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