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欧拉线与九点圆
Author:
吕胜
GeoGebra
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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
兩位數除以一位數（二）
拼砌四邊形
【案例】2018年全国1卷理科12题
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waaachen0001
畫三角形 題1d
三角形的內心軌跡
分數認識
四次函數圖形的變化
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Equilateral Triangles
Angles
Statistical Characteristics
Probability
Diagrams