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GeoGebra
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兩位數加法
兩組對邊相等和有直角的四邊形
判斷球體
拼砌四邊形
第八周作业
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龍騰4_1-1習6-2
大樂透開獎機
gmy106a10 限制範圍的三角形面積
geogebra
有趣的梯形面積問題
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Percentages
Angles
Similar Triangles
Parametric Curves
Division