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弦中點的軌跡
Author:
Ho-Kai Chen
Topic:
Circle
所有過圓內定點A之弦, 這些弦的中點所形成的軌跡
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
異分母分數減法
三位數除以一位數（一）
判斷球體
【案例】2013年安徽高考15题
Discover Resources
周界-平移法(練習三)
test
菱形
Parabola_Vertical
P4構作對稱圖形
Discover Topics
Square
Linear Programming or Linear Optimization
Tangent Line or Tangent
Division
Constructions