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橢圓軌跡_過圓內一點與圓內切
Author:
Wu Xiao-Ren
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
【案例】2013年安徽高考15题
三位數除以一位數（一）
Discover Resources
Area of Triangle_2
垂足三角形
cubes
CK雋翔的GGB BOOK
我的第一个GGB绘本
Discover Topics
Circumcircle or Circumscribed Circle
Median Value
General Quadrilateral
Unit Circle
Trigonometric Functions