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Length of Horizontal or Vertical Line Segments 水平或鉛垂線段的長度
Author:
Alex CHIK
Topic:
Line Segment
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
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GeoGebra笔记功能体验课件
兩組對邊相等和有直角的四邊形
異分母分數減法
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
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探索三角形外角定理
例子
Drag the red dots, see the area ratio of EHFG to ABCD
文繞圖1
圆之吻（Apollonius circles）
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Functions
Calculus
Planes
Cosine
Volume