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一线三等角全等模型
Author:
张老师
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
異分母分數減法
畫出對稱圖形
兩位數除以一位數（一）
Discover Resources
最大三角形面積
Quadratic Function Calculator 二次函數計算器
UpdateConstruction
動態正方形(未完成)
數學傳播39卷4期, 平面幾何公式思考
Discover Topics
Optimization Problems
Geometric Mean
Tree Diagrams
Curve Sketching
Function Graph