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四則1
Author:
周錦鋒
GeoGebra
New Resources
探究三角形的全等條件
GeoGebra笔记功能体验课件
垂直線的斜率
祖冲之的期望：内棋与外棋
兩位數除以一位數（二）
Discover Resources
testing
線型函數
平面幾何的思考
作线段和角
一线三等角模型
Discover Topics
Division
Random Variables
Rectangle
Polygons
Indefinite Integral