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operations of matrix 2rd ver
Author:
华杰 苏
Topic:
Matrices
GeoGebra
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常见四边形是否是双心四边形
科赫雪花
圓的基本性質
撒针估算面积实验
第八周作业3
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應該是錯誤的圖
(正)長方體
學習單：平行四邊形面積
展開圖
动感数学
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Triangles
Area
Differential Calculus
Interest Calculation
Logarithm