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證平行四邊形 (對角相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
正方形雪花图案
平行線的判定
斐波那契螺旋弧线(表格法-可动态调节)
斐波那契螺旋弧线(表格法)
第八周作业
Discover Resources
南瓜趣臉
應用題解題法
Apollonius Problem 7 CCP poncelet
廣義三角函數
Equal Angles, Equal Arcs and Equal Chords
Discover Topics
Constructions
Conic Sections
Polygons
Tangent Line or Tangent
Dilation