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椭圆定义
Author:
代红军
GeoGebra
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活动三：应用性质
盈利與虧蝕
第三周作业效果演示
比較五件物件的重量
龙形曲线-分形龙2
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解題的結果
angles sum of a triangle 3
正弦函數的遞增與遞減
向外延伸的多邊形
正圆台展开图
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Secant Line or Secant
Fractions
Logarithm
Median Line
Confidence Interval