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平行四边形的面积公式推导
Author:
海清
GeoGebra
New Resources
第八周作业3
龙形曲线-分形龙
撒针估算面积实验
第三周作业效果演示
比較五件物件的重量
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複息的威力
三個外切圓
相同圖形的拼砌(三角形)
Reflectional symmetry of Triangular prism
畫三角形 第1題
Discover Topics
Sequences and Series
Percentages
Isosceles Triangles
Linear Equations
Geometric Distribution