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中垂線
Author:
Chang Hui Fang
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球體建築師
画直线等分三角形的面积
兩位數加法
拼砌四邊形
找出對稱軸
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test
Generalized Pythagorean Theorem
gslsj 橫向的三角數列
Copy of 固定面積的圖形的周界變化
軌跡觀察
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Means
Angles
Pyramid
Mathematics
Curve Sketching