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初三奥赛:圆的切割线问题
Author:
王俊辉
拖动点P,或点D,改变其位置,探究点F的轨迹。
GeoGebra
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第三周作业效果演示
平行線的判定
科赫雪花
小学资源收集
龙形曲线-分形龙2
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外心
十字相乘法因式分解
Magic Matches
Exploration of the conditions for congruent triangles.
谢氏地毯
Discover Topics
Set Theory
Solids or 3D Shapes
Fractions
Power Functions
Parallelogram