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GeoGebra
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兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
兩位數加法
拼砌四邊形
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task 1
大無限圖
GGB6
五邊形的簡介
Copy of Finding the H.C.F. and the L.C.M.
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Terms
Trigonometry
Linear Regression
Special Points
Quadrilaterals