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畢氏定理完成20170330final
Author:
許志昌
GeoGebra
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画直线等分三角形的面积
兩組對邊相等的四邊形
異分母分數減法
【案例】2018年全国1卷理科12题
算柱 (兩位數)
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分數與小數
angle sum of polygon
全排列
n-m9bch1-1-2b-二次函數及其圖形-07
根據百分率找數量（二）: 例4的副本
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Geometric Distribution
Percentages
Curve Sketching
Inequalities
Volume