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探究垂线段的性质
Author:
孙逸旻
GeoGebra
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【案例】2018年全国1卷理科12题
拼砌四邊形
兩位數加法
三位數除以一位數（二）
算柱 (兩位數)
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Example 1
Area of cirle
Homework4
如何求切線長
拋物線5--包絡線法
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Linear Equations
Plane Figures or Shapes
Angles
Isosceles Triangles
Step Functions