Question
At the centre of a circle of 20 cm radius, the angle
made by an arc of 24(4/9) cm length isSolution
Here, radius r = 20 cm, arc length s = 24(4/9) cm = 220/9 s = rθ ⇒ θ = 220/(9 × 20) ⇒ θ = 11/9 rad => 11/9 × 180/π = 220/3.14 => 70°
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