圆周角
来自维基百科,自由的百科全书
来自维基百科,自由的百科全书
一般來說,圓周角可被視為共用一個端點的兩條弦。
圓周角的基本性質記載於《幾何原本》第三卷的第20至22號命題。几何原本中的命题为:
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.