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動圓的圓心軌跡為橢圓
Author:
Ho-Kai Chen
Topic:
Ellipse
拉動大圓上的N點, 觀察圖形的變化!
GeoGebra
New Resources
錐體建築師
找出對稱軸
兩位數加法
第八周作业
兩組對邊相等的四邊形
Discover Resources
電子幾何條（2014）
S6 3D Basic Concept
學習單：Hilbert Curves
Rolling Star
star1
Discover Topics
Definite Integral
Planes
Congruence
Pyramid
Arithmetic Mean