I want to use the command "\angle". I have the "amsmath" package included im my document, and I can use any other math commands, but not this. What I need to do? It requires a different package?
Thank you!
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amsmath.\usepackage{amssymb}is required. (this question will probably be closed, as the answer can easily be found by the mechanism described in this question: How to look up a symbol or identify a math alphabet? – barbara beeton Mar 22 '15 at 19:49