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垂足三角形
Author:
孟宝兴
垂足三角形
GeoGebra
New Resources
找出對稱軸
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
異分母分數減法
兩位數除以一位數（一）
Discover Resources
球差曲线
Triangle
Normal Vector
量度長度(厘米)
Sphere[O, r]
Discover Topics
Boxplot
Sine
Square
Probability
Constructions