You have a square glass panel with 24 cm sides and a ring with 5 cm internal diameter.
Cut the glass in 4 identical pieces such that you can slide them through the ring.

Please bear with my ugly ascii diagram :).

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This way, the width of each piece is 3cm throughout.  3cm x ¡Ì2 ¡Ö 4.245cm < 5cm, so the ring will fit around the corners (assuming the ring thickness isn't an issue).

Posted by josh on 2005-07-01 21:03:17