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sine graph 變換
Author:
lamanleung
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毕氏螺线
勾股树123
Aire Cercle 的副本
GGB printable logo 3
未命名
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方格紙上畫平行四邊形4
Properties of Inequalities 不等式的加法與乘法性質
畢氏定理證明（Ｉ）
椭圆的参数方程
南一例8，橢圓軌跡
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Translation
Step Functions
Derivative
Right Triangles
Trigonometry