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黎曼和
Author:
sheri.chen
GeoGebra
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兩位數除以一位數（一）
【案例】2013年安徽高考15题
算柱 (兩位數)
三位數除以一位數（一）
兩組對邊相等的四邊形
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邊角關係
ghseh 二次函數描點法頂點法-5
BkD_act15_02c
向量線性組合的範圍
動態軌跡與動態色彩
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Vectors 2D (Two-Dimensional)
Equilateral Triangles
Special Points
Intersection
Division