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定长线段在相交直线上滑动
Author:
冯伟冀
GeoGebra
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双心四边形
折扣
常见四边形是否是双心四边形
撒针估算面积实验
龙形曲线-分形龙2
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latex 的東西
找中點的坐標
判斷柱體 6
同學最喜愛的運動
[洋葱] 根据图象求参数取值范围-上(0118)
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Translation
Solids or 3D Shapes
Congruence
Arithmetic Operations
Function Graph