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平行线分线段成比例
Author:
周胜华
GeoGebra
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【案例】2013年安徽高考15题
四邊形的特性
拼砌四邊形
三位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
XY 圖線段長度計算
雙曲線的副本
congruent triangles_provided by Mr Yeung Kar Chun
资料共享每日一题
圆与圆的位置关系
Discover Topics
Function Graph
Parabola
Set Theory
Geometric Mean
Normal Distribution