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angle 123
Author:
zhihuai1982
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（一）
球体的体积推导（优化版）
GeoGebra笔记功能体验课件
找出對稱軸
Discover Resources
反餘弦函數
史坦納圓鍊 (Steiner Chain)
空白範本
我的第一个GGB绘本
限制範圍
Discover Topics
Binomial Distribution
Statistical Characteristics
Dilation
Derivative
Tree Diagrams