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Author:
许春兰
GeoGebra
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常见四边形是否是双心四边形
撒针估算面积实验
百分數及其應用
双心四边形
盈利與虧蝕
Discover Resources
五星形的頂角
圖一
畢氏定理的圖形證明法
Trigonometric Ratios
凸透镜原理模拟
Discover Topics
Tangent Line or Tangent
Pythagoras or Pythagorean Theorem
Conic Sections
Trigonometry
Integral Calculus