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拋物線5--包絡線法
Author:
06房石祐
GeoGebra
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椭圆内切圆链
龙形曲线-分形龙
盈利與虧蝕
折扣
平行線的判定
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平行四邊形的面積
田中的道路1
谢尔宾斯基三角形
Copy of 平行四邊形的面積教材一
動量守恆相圖分析
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Cube
Fractions
Curve Sketching
Polygons