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同旁內角---水平平行綫
Author:
chanfushun
GeoGebra
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【案例】2013年安徽高考15题
判斷球體
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
兩組對邊相等的四邊形
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IQ 波形合成圖
弧長與圓周角成比例
滾動的圓
Cycloid
圓與切線
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Reflection
Differential Calculus
Right Triangles
Mode
Exponential Functions