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梯形面積(求上底)
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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畫出對稱圖形
拼砌四邊形
判斷球體
兩位數除以一位數（二）
三位數除以一位數（一）
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Expectation Value 期望值
三个角只有一个角度数变1
斜率的副本
K1+k2
圖5(動能分析)
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Boxplot
Random Experiments
Calculus
Probability
Integers