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16-05-2023
Mathematics

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2 The diagram shows a trough of length 2 metres placed on level ground. The trough has a semi-circular cross section of radius 50 cm and contains water. The depth of the water is 20 cm. AB is 80 cm and C is a point on the are AB. 0. 50cm 80 cm 20cm 2m (a) Show that angle AOB 106.3° [2]

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