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平行線法
Author:
chen mingchuan
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
找出對稱軸
球體建築師
異分母分數減法
Discover Resources
長方體的切割(二)
夜市麻將模擬機
五点共圆
五边形的旋转平铺（迭代加序列）
三角形相似的直观显示.许兴华数学
Discover Topics
Matrices
Pyramid
Hypothesis Testing
Subtraction
Linear Functions