I need help with a trigonometry question plz answer!!

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by lammy. at May 18, 2010

P, A, B and C are four points in a plane such that the angles BPA and CPA are obtuse and on opposite sides of PA. PA = 8cm, BP =10cm, PC = 12cm, AB= 14cm and AC = 18 cm. Calculate the length of BC and the area of the triangle ABC.