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元旦快乐（制作：孟宝兴）
Author:
孟宝兴
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
三位數除以一位數（二）
第八周作业
兩位數除以一位數（一）
Discover Resources
內切圓滾動有圖更新
五邊形中點
對稱圖形
Pyramid with square base (angle between planes)
分點與向量比
Discover Topics
Terms
Polynomial Functions
Cone
Similar Triangles
Mathematics