SPHERICAL ANGLE OPENING LEFT is one of the 128 characters in the Miscellaneous Mathematical Symbols-B Unicode subset.
The image below shows how the SPHERICAL ANGLE OPENING LEFT symbol looks like in some of the most complete UTF-8 fonts: Code2000, Sun-ExtA, WenQuanYi Zen Hei and GNU Unifont. If the font in which this web site is displayed does not contain the SPHERICAL ANGLE OPENING LEFT symbol, you can use the image below to get an idea of what it should look like.
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