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The figure below shows two triangles, ABC and BCD with a common base BC = 3.4 cm. AC = 7.2 cm, CD = 7.5 cm and ABC = 90^o. The area of triangle ABC = Area of triangle ?BCD.

Calculate, correct to one decimal place: (a) the area of triangle ABC;(3 marks) (b) the size of ?BCD; (3 marks) (c) the length of BD;(2 marks) (d) the size of ?BDC.(2 marks)