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正方形
Author:
何嘉驹
GeoGebra
New Resources
平行線的判定
第八周作业
龙形曲线-分形龙2
折扣
异形操场
Discover Resources
「相似三角形」任务2
史坦納圓鍊 (Steiner Chain)
利用邊對摺找三角形的內心
buji
量角器
Discover Topics
Quadratic Functions
Plane Figures or Shapes
Division
Quadrilaterals
Triangles