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testing2
Author:
iedc
GeoGebra
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兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
兩位數除以一位數(二)
画直线等分三角形的面积
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代數運算:外心座標
行星運動
Perimeter
畢氏定理 (勾股定理) <Pythagorean theorem>
推移(x 方向)的副本
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Planes
Special Points
Root
Surface
Equilateral Triangles