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GeoGebra
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兩位數除以一位數(一)
四邉形 (四年級) 教師版
畫出對稱圖形
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
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面積2
zentangle
外心
題 2
橢圓2-四圓心近似法
Discover Topics
Statistical Characteristics
Linear Regression
Sine
Median Line
Cosine