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正三角形在长方形边上移动加滚动
Author:
赵林
GeoGebra
New Resources
折扣
第八周作业2
龙形曲线-分形龙2
龙形曲线-分形龙
正方形雪花图案
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數學作圖
雙搖桿
n星角 のコピー
Copy of 平行四邊形的面積
抛豆实验
Discover Topics
Similar Triangles
Centroid or Barycenter
Random Variables
General Quadrilateral
Definite Integral