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量角器3
Author:
Sheu Anderson
GeoGebra
New Resources
兩位數加法
球体的体积推导（优化版）
錐體建築師
四邉形 (四年級) 教師版
第八周作业
Discover Resources
color
Apollonius Problem kissing coin problem
P6 圓周02D
fraction compare
两圆上两动点分别以相同的线速度运动时，连线中点的轨迹（绿色花朵）
Discover Topics
Trapezoid
Triangles
Plane Figures or Shapes
Special Points
Geometry