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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
New Resources
球體建築師
四邉形 (四年級) 教師版
柱體建築師
直角坐標平面上的旋轉變換
異分母分數減法
Discover Resources
空間中的平面
locus wrt two pts on two indep. circle
Origami-Trisect An Angle
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
小數的認識（一）
Discover Topics
Unit Circle
Random Variables
Logarithm
Linear Regression
Line Segment