29) In the figure, AB and CD are two chords of a circle with centre O and MN as diameter. They intersect at point E. If A E N = D E N = 45 °   and AB = 6.5 cm, then the length of chord CD is equal to.



( a )   13   c m ( b )   6 . 5   c m ( c )   7 . 0   c m ( d )   n o n e   o f   t h e s e



Draw OPAB and OQCDIn OPE and OQEOPE = OQE    90° eachPEO = QEO    as, AEN = DEN = 45°       EO = EO   CommonOPE  OQE   AASOP = OQ   CPCTSo, chords AB and CD are equidistant from the centre.We know that chords that are equidistant from the centre are equal in length.So, AB = CD = 6.5 cm

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 It will be equal to 6.5.
 
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CD will be 6.5 by the theorem if the angle substended by 2 chords is equal than the chords are equal
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6.5 according to theroem
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