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一线三等角全等
Author:
海平 文
Topic:
Triangles
GeoGebra
New Resources
撒针估算面积实验
异形操场
平行線的判定
常见四边形是否是双心四边形
双心四边形
Discover Resources
判斷柱體 3
由對稱方法畫出指數函數的圖形
測試作業？
動畫
巧算周界
Discover Topics
Straight Lines
Arithmetic Operations
Constructions
Complex Numbers
Vectors