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直角三角形斜邊上的高小於斜邊的一半
Author:
chihchengliang
GeoGebra
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【案例】2013年安徽高考15题
漂亮的摇摆曲线
垂直線的斜率
球体的体积推导
圓的切線方程
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正九邊形
Generalized Pythagorean Theorem
Triangle
正四面體
NBA中国官网
Discover Topics
Linear Regression
Bar Chart or Bar Graph
Surface
Fractions
Median Line