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图案A
Author:
吉顺国
GeoGebra
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探究三角形的全等條件
第八周作业
圓的切線方程
【案例】2013年安徽高考15题
球体的体积推导
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圖一
四邊形四個九點圓共點
Geometry: Angles Sum of Triangle (幾何：三角形內角和)
割补法
幂函数
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Rotation
Orthocenter
Conditional Probability
Equilateral Triangles
Functions