Geometryhard · Past Paper
An arc of length 20 cm subtends an angle of 2 radians at the center. What is the radius of the circle?
A5 cm
B10 cm
C20 cm
D40 cm
✓ Correct Answer: B — 10 cm
Arc length s = r * theta (in radians). 20 = r * 2 => r = 10 cm.
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