in figure PQ=XY, OM=4cm, find the length of ON
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Solution : In the figure O is the centre of the circle and OM,ON are the perpendiculars from the centre to the chords PQ and RS respectively.
If OM=ON and PQ=6cm
We know that if two chords are equidistant from the centre then the two chords are equal in length.
Hence PQ=RS
∴RS=6cm
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