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1987全国理15
Author:
常振虎
GeoGebra
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四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
找出對稱軸
第八周作业
三位數除以一位數（二）
Discover Resources
Parallelogram 02
三次函數圖形、極值、反曲點
动态曲线
定理介紹：切線性質 | Tangent Properties
正方体、正四面体的外接球
Discover Topics
Complex Numbers
Vectors 3D (Three-Dimensional)
Isosceles Triangles
Logarithm
Incircle or Inscribed Circle