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Introduce tangent ratio
Author:
VCChung
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（二）
柱體建築師
GeoGebra笔记功能体验课件
【案例】2018年全国1卷理科12题
Discover Resources
內次擺線
Normal dist. (常態分布互動ggb)
利用对称求线段和最值（移动端）
GGB基礎教學Reuleaux
畢氏定理
Discover Topics
Function Graph
Complex Numbers
Definite Integral
Median Line
Quadrilaterals