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工具：PlaneText, PlaneArrow
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
拼砌四邊形
四邉形 (四年級) 教師版
找出對稱軸
画直线等分三角形的面积
球體建築師
Discover Resources
餘弦定理
Apollonius Problem gergonne 0
正方體橫截面及平面展開圖
三角形的概念
初中几何证明
Discover Topics
Quadrilaterals
Correlation
Histogram
Constructions
Exponent