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同位角__水平平行綫
Author:
chanfushun
GeoGebra
New Resources
兩位數加法
找出對稱軸
兩組對邊相等和有直角的四邊形
球體建築師
【案例】2013年安徽高考15题
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類尺規作圖
ggb-fs-a3 用物件表示分數比例
三個交點
立體圖形
算幾不等式
Discover Topics
Cone
Plane Figures or Shapes
Sine
Natural Numbers
Cosine