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九點圓 的複本
Author:
chen mingchuan
,
Wu Xiao-Ren
三角形的三中點，三垂足，三頂點到垂心中點共圓
GeoGebra
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圓的基本性質
祖冲之的期望：内棋与外棋
【案例】2013年安徽高考15题
直線的斜率：水平變化 & 鉛垂變化
科氏力 (Coriolis Force)
Discover Resources
雨刷練習
...
正立方體截痕
點和圓的位置關係的副本
百分數及其應用
Discover Topics
General Quadrilateral
Area
Similar Triangles
Random Experiments
Vectors 3D (Three-Dimensional)