It depends on what shape the glass is.
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Glasses typically have no lines of symmetry. The lenses are usually asymmetrical in shape, and the frames may have varying designs that do not exhibit symmetry. However, certain types of glasses, such as perfectly circular lenses or frames, may have one line of symmetry if they can be folded along a central axis to create a mirror image on either side.
10 lines of symmetry
2 lines of symmetry
There are infinitely many lines of symmetry. Every line can be a line of symmetry for a suitable shape.
A TRAPIZOID has 2 lines of symmetry
There are eight lines of symmetry.