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congruent (SA)
Author:
Ricky Chan
GeoGebra
New Resources
異分母分數減法
錐體建築師
三位數除以一位數（一）
兩組對邊相等的四邊形
第八周作业
Discover Resources
銳角三角函數值的大小比較
Angry Bird
球體建築師
光的折射（光线自右下向左上）
數軸
Discover Topics
Coordinates
Complex Numbers
Linear Regression
Constructions
Linear Equations