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廣義角
Author:
yuchengda
GeoGebra
New Resources
兩組對邊相等的四邊形
錐體建築師
第八周作业
找出對稱軸
異分母分數減法
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三角形，點上平分面積
三角形有向面積
多重刻度磅
hello
橢圓1--同心圓法
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Addition
Ratios
Distributions
Area
Statistical Characteristics