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与两圆都相切的动圆圆心的轨迹
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
New Resources
椭圆内切圆链
折扣
百分數及其應用
第三周作业效果演示
正方形雪花图案
Discover Resources
直方圖_Demo
大樂透開獎機
asasd
複合棒形圖2
剪切成正三棱柱(制作:李三军,修订:孟宝兴)
Discover Topics
Geometric Transformations
Numbers
Solids or 3D Shapes
Diagrams
Isosceles Triangles