ABC ABC\,ABC and ACD ACD\,ACD are right-angled triangles.
AB=15 cmAB = 15\text{ cm}AB=15 cm, BC=9 cmBC = 9\text{ cm}BC=9 cm and CD=13 cmCD = 13\text{ cm}CD=13 cm.
Calculate the length of ADADAD.
Give your answer to 3 significant figures.
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