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[教学] 欧拉线与三角形的心1：三角形的重心
Author:
acchu
GeoGebra
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兩組對邊相等的四邊形
算柱 (兩位數)
找出對稱軸
兩組對邊相等和有直角的四邊形
Fibonacci Clock
Discover Resources
高線
正弦定理
How tall is that?
If指令的應用1
加法
Discover Topics
Numbers
Similarity Transformation or Similarity
Rotation
Coordinates
Geometric Transformations