+**180** most commonly refers to 180 [Degrees](/wiki/Degree), representing a half-turn or a straight angle in [Geometry](/wiki/Geometry). Idiomatically, to "do a 180" signifies a complete reversal of direction, opinion, or plan, symbolizing a fundamental shift.
+## See also
+- [Number](/wiki/Number)
+- [Angle](/wiki/Angle)
+- [Direction](/wiki/Direction)
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