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任务6：三角形三边关系
Author:
陈丽婷
GeoGebra
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平行線的判定
第八周作业3
三角函数 的副本
第八周作业
盈利與虧蝕
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Pappus 定理
黎曼和
Redefining Trigonometry by a Unit Circle
線性組合3：正方形
雙曲線的頂點
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Triangles
Linear Programming or Linear Optimization
Parabola
Ellipse
Binomial Distribution