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dandelion
Author:
杨晓晨
Topic:
Conic Sections
GeoGebra
New Resources
椭圆内切圆链
龙形曲线-分形龙2
正方形雪花图案
比較五件物件的重量
第三周作业效果演示
Discover Resources
test for fun
軌跡
ABC 3
直角三角形的內心與相似
探索勾股三元数
Discover Topics
Ellipse
Functions
Tree Diagrams
Tangent Line or Tangent
Linear Programming or Linear Optimization