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切割線定理_和圓有關的比例線段
Author:
Loi Teng Chong
GeoGebra
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三角函数 的副本
盈利與虧蝕
科赫雪花
正方形雪花图案
平行線的判定
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初三奥赛：圆的切割线问题
整數或分數÷分數_ 工作紙（一）_題1d
Angle in Alternate Segment 2
中學(初中)
棒形圖2(我最喜愛的科目)
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Rectangle
Trapezoid
Statistical Characteristics
Step Functions
Quadrilaterals