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畢氏定理證明（Ｉ）
Author:
林辰燁
GeoGebra
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四邊形的特性
畫出對稱圖形
柱體建築師
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
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柱體建築師 1
Circle
正多角柱(簡易)
九九乘法表的認識
「相似三角形」任务3的副本
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Surface
Similar Triangles
Probability
Equilateral Triangles
Fractions