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1A ROTATION
Author:
lo yat lung
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
斐波那契螺旋弧线（表格法-可动态调节）
盈利與虧蝕
第八周作业
科赫雪花
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畫三角形 題4a
Angle at Centre & Angle at Circumference: Proof 圓心角與圓周角：証明
包絡線1
內心
拋物線1--焦點法
Discover Topics
Trapezoid
Multiplication
Centroid or Barycenter
Integral Calculus
Complex Numbers