Question

the radius of a circle is 9 cm find the length of Arc of the circle which cut off a chord of length equal to the length of radius​

Answer 1

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• Chord is Equal to radius which means that Traingle is Equilateral
• So all angles are of 60°
• Length of arc =
• $\pi \: rtheta \div 180$
• $= \frac{ \frac{22}{7} \times \: 9 \times 60}{180}$
• $= \frac{22 \times 9}{21} = \frac{66}{7} = 9.428cm$