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the definition of ellipse
Author:
丁明智
GeoGebra
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GeoGebra笔记功能体验课件
画直线等分三角形的面积
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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畫三角形 題1c
Rotation 旋轉變換
重複排列
解題四
一线三等角模型
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Differential Equation
Diagrams
Exponent
Similar Triangles
Percentages