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平面鏡成像 Image of Plane Mirror Reflection
Author:
W.L. Wong, Albert
GeoGebra
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常见四边形是否是双心四边形
比較五件物件的重量
直線的斜率:水平變化 & 鉛垂變化
折扣
平行線的判定
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angles sum of a triangle 3
橢圓的定義(by Jutor)
Copy of 三角形的面積
放缩尺
直线与圆、圆与圆的位置关系
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Real Numbers
Boxplot
Volume
Cube
Trigonometry