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please can you help me work it out, I only know how to work out the perimeter of the circle (arc length + 2 x

please can you help me work it out, I only know how to work out the perimeter of the circle (arc length + 2 x radius) but Idk the other bit. thank you

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The diagram shows a mirror which has been designed for a new hotel. The shape consists of a sector of a circle and a kite AOCB. O . The circle, centre O, has a radius 140 0 C of 50 centimetres. A . Angle AOC = 140. . AB and CB are tangents to the circle at A and C respectively. Find the perimeter of the mirror. B Ins 467cm

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