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劉虹圻 內心
Author:
呂麗珠
GeoGebra
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兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
柱體建築師
兩位數除以一位數（一）
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Pokemon quiz (daliy)
Distributive Law of Multiplication 1 (乘法的分配率 1)
Multiplication of Polynomials (多項式的乘法 2)
任意角的三角函数
垂心(劉虹圻623)
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