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垂心即內心
Author:
dunst kang
Topic:
Mathematics
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
祖冲之的期望：内棋与外棋
【案例】2018年全国1卷理科12题
垂直線的斜率
圓的切線方程
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範例：畫圈圈的筆
三角形內角和
平移
菱形
翰林數學_2下_CH4-1_平行線的特性與定義
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Plane Figures or Shapes
Unit Circle
Kite
Translation
Similar Triangles