The measure of angle subtended at the centre by a chord of length of radius is
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incomplete question.....
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Given
⇒ Length of an arc = 5π/3 cm
⇒ r=5cm
⇒ Length of an arc = θ/360° (2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
∴ 5π/3 = θ/360° ×2π×5
∴ θ= 360/6
∴ θ=60°
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