查看“︁旋轉角度”︁的源代码

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[[Image:Examples of Polar Coordinates.svg|thumb|250px|從黑線到綠線的旋轉角度是60°，從黑線到藍線的旋轉角度是210°，從綠線到藍線的旋轉角度是{{nowrap|1=210°- 60°= 150°}}。<!--The angle of rotation from the black ray to the green segment is 60°, from the black ray to the blue segment is 210°, and from the green to the blue segment is {{nowrap|1=210° − 60° = 150°}}. --><!-- A complete [[rotation]] about the center point is equal to 1 [[turn (geometry)|turn]], 360[[degree (angle)|°]], or 2[[pi|π]] [[radian]]s.-->]]
[[File:Math Trigonometry Unit Circle Rotation Sign Indication.svg|thumb|旋轉方向<!--Indication of the sign and amount of key angles according to rotation direction-->]]

'''旋轉角度'''（{{tsl|en|Angle of rotation}}）是對圍繞一固定點（通常是[[圓心]]）旋轉量（即[[角度]]）的度量。<ref name=SILVA>{{cite book|title=Fundamentos De Matematicas / Mathematical Fundamentals|author=Juan Manuel Silva, Adriana Lazo|publisher=Editorial Limusa|year=2005|url=https://books.google.es/books?id=TyRUwQ4pKLMC&pg=PA493#v=onepage&q&f=false|isbn=9789681850951|pages = 493 de 1256|access-date= 2019年7月23日}}</ref>是[[極坐標系]]和[[三角學]]的基本元素。

== 特性 ==
如果旋轉角度表示為AOR()
*<math>AOR(360a+b)=AOR(b)</math>適用於所有整數 ''a'' 和實數值 ''b''。

== 參考 ==
{{reflist}}

{{几何术语}}

[[Category:几何术语]]