ab is a chord of a circle with centre O and radius 4cm. AB is of length 4 cm. find the area of the sector of the circle formed by chord AB
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is it 176/21 = 8.38 cm^ .........
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but how?
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Draw a circle in which o is the centre of the cicle and AB is the chord .Join OA and OB .Now,AO=BO=4cm and AB=4 cm .Then triangle ABC formed equilateral triangle ,we know that each angle is equal to 60°.At the centre become 60°.Now,area of sector
=πr2thita=π×4×4×60=3017.14AnsweStep-by-step explanation:
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