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In Fig. 9.25, diagonals AC and BD of ...

In Fig. 9.25, diagonals AC and BD of quadrilateral ABCD intersect at O such that `O B"\ "="\ "O D` . If `A B"\ "="\ "C D` , then show that: (i) `a r"\ "(D O C)"\ "="\ "a r"\ "(A O B)` (ii) `a r"\ "(D C B)"\ "="\ "a r"\ "(A C B)` (iii) `D A"\ "||"\ "C

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