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正三角形内的旋转
Author:
汪娟
GeoGebra
New Resources
折扣
常见四边形是否是双心四边形
盈利與虧蝕
科氏力 (Coriolis Force)
龙形曲线-分形龙
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Ratio of angles at the centre and the length of the arcs.
複合圖形(七)
平面外積、有向面積、二階行列式
指數1209
第10题
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Subtraction
Complex Numbers
Plane Figures or Shapes
Vectors
Translation