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AB is a chord of circle with centre O and radius 4cm. AB is length of 4cm. Find the area of sector of the circle formed by chord AB

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AB is a chord of circle with centre O and radius 4cm. AB is length of 4cm. Find the area of sector of the circle formed by chord AB.

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AB is chord AB = 4cm

OA = OB = 4cm

OAB is equilateral triangle ∠AOB = 60°

Area of sector (formed by chord [shaded region]) = (area of sector)

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