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Key Stage 4 (Senior Secondary)
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4.2 Measures, Shape & Space 度量、圖形與空間
Basic properties of circles 圓的基本性質
GeoGebra Classroom: 圓的性質弧、圓心角、圓周角、 探射燈、圓內的直角三角形、 圓心角與圓周角：証明、 圓內的角：測驗
Converses of Theorems on Circle Properties
GeoGebraBook: Circle Geometry
Locus 軌跡
GeoGebra Classroom: 軌跡
軌跡（學生版）、軌跡方程：與兩點保持等距、滾動的正多邊形、滾動的硬幣
軌跡（教師版）
Upside Down?
Equations of straight lines and circles 直線與圓的方程
GeoGebra Classroom: 直線方程
方程的直線、 直線的方程、直線的方程：測驗
GeoGebra Classroom: 圓方程
More about trigonometry 續三角
Defining Trigonometric Ratios
GeoGebra Classroom: 續三角學
任意角的三角比、參考角、正弦公式、餘弦公式：証明、解任意三角形(SSA情況)、希羅公式：証明
GeoGebra Classroom: 續三角學的應用HKDSE Sample Paper I #18, Practice Paper I #18, 2012 Paper I #18, 2013 Paper I #18, 2014 Paper I #17, 2015 Paper I #19, 2016 Paper I #19, HKDSE 3D Figure Collection
Trigonometric Graphs and the Unit Circle
Six Trigonometric Graphs and the Unit Circle
