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quiz 9.1 2(a)
Author:
lamanleung
GeoGebra
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兩位數加法
三位數除以一位數（二）
画直线等分三角形的面积
圓的切線方程
多邊形的面積
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高中數學函數圖形
Apollonius Problem 10 CCC poncelet
thm 11,12
HHHH
拼貼3
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Probability
Means
Bar Chart or Bar Graph
Symmetry
Linear Programming or Linear Optimization