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In the figure given figure AB = 9cm, PA ...

In the figure given figure AB = 9cm, PA = 7.5 cm and PC = 5 cm. Chords AD and BC intersect at P.
(i) Prove that `DeltaPAB~DeltaPCD`
(ii) Find the length of CD.
(iii) Find area of `DeltaPAB` : are of `DeltaPCD`

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