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动点问题（线段最小值）
Author:
杨桃李@
GeoGebra
New Resources
圓的基本性質
第八周作业2
龙形曲线-分形龙
活动三：应用性质
第八周作业
Discover Resources
waaachen
test
Compare areas by cutting shapes Q3
編織圓
多普勒效应动态演示
Discover Topics
Special Points
Dilation
Geometric Distribution
Prism
Multiplication