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勾股定理
Author:
李洋
GeoGebra
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活动三：应用性质
三角函数 的副本
第八周作业2
龙形曲线-分形龙
双心四边形
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兩圓關係與公切線
qid_39321
∆ABD 面積 = ?
各種五邊形
Completing the square(配方法)
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Polynomial Functions
Histogram
Line Segment
Rectangle
Trapezoid