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Outline
圓的性質
Arcs and Angles at Centre/ Circumference 弧、圓心角與圓周角
Spotlight 探射燈
Right Triangles in a Circle 圓內的直角三角形
Angle at Centre & Angle at Circumference: Proof 圓心角與圓周角：証明
Quiz on Angles in a Circle 圓內的角：測驗
圓的性質
Author:
Alex CHIK
GeoGebra 互動數學教室
http://www.geogebra.hk
Arcs and Angles at Centre/ Circumference 弧、圓心角與圓周角
Spotlight 探射燈
Right Triangles in a Circle 圓內的直角三角形
Angle at Centre & Angle at Circumference: Proof 圓心角與圓周角：証明
Quiz on Angles in a Circle 圓內的角：測驗
Next
Arcs and Angles at Centre/ Circumference 弧、圓心角與圓周角
New Resources
sanjiaohanshu
算柱 (兩位數)
三半圓間的相切圓(Codex╱2026.10.07)
伊朗國旗 (Codex╱2026.10.07)
近似值：有效數字
Discover Resources
可變大的圓桌
立體三角測量(例七&八)
線對稱圖形
congruent triangle_provided by Mr Yeung Kar Chun
「相似三角形」任务2的副本
Discover Topics
Quadrilaterals
Multiplication
Numbers
Vectors
Geometric Mean
