1. She has glasses whose arms are broken.

2. She is holding glasses whose arms are broken.

3. She is wearing glasses whose arms are broken.
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Does #1 mean #2 or #3?

Are you writing about the glasses (spectacles) people wear to improve their eyesight?

http://en.wikipedia.org/wiki/Glasses

Rather than "arms" we use the term "temples" or "temple pieces" --
http://www.eyeglassdirect.com/imgs/glass-diagram.jpg

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#1 can mean either #2 or #3.
#2 means she's not wearing them, but she's holding them in her hands.
#3 means she has them on her face correctly so she can see through the lenses.

In this case, sentence #1 "She has glasses whose arms are broken" can be interpreted as either #2 "She is holding glasses whose arms are broken" or as #3 "She is wearing glasses whose arms are broken." The ambiguity arises from the word "has" which can imply either possession or wearing.

To determine the correct interpretation, we need more context or clarification from the speaker or the written text where this sentence is used. Without further information, it is not possible to definitively say whether it means #2 or #3.