Geometryhard · Past Paper
If a chord subtends an angle of 120 degrees at the center of a circle of radius 12 cm, find the length of the chord.
A12 cm
B12*sqrt(3) cm
C24 cm
D6*sqrt(3) cm
✓ Correct Answer: B — 12*sqrt(3) cm
Chord length = 2 * r * sin(theta/2) = 2 * 12 * sin(60) = 24 * (sqrt(3)/2) = 12*sqrt(3) cm.
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