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弧长与半径
Author:
军云
GeoGebra
New Resources
第八周作业3
活动三：应用性质
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业2
正方形雪花图案
Discover Resources
垂心即內心
折扣 例5
P2 math
regular tetrahedron (CH4)
橢圓包絡線1060406
Discover Topics
Vectors
Symmetry
Hyperbola
Function Graph
Congruence