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Author:
keith leung
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Tim Brzezinski
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GeoGebra
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拼砌四邊形
算柱 (兩位數)
球體建築師
兩位數除以一位數（二）
直角坐標平面上的旋轉變換
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圓和弦圓和弦
托勒密定理推廣到任意四邊形一
同心圓內的直線2
gjh-g03-01 和的平方公式的副本
平方差公式的几何意义
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Multiplication
Linear Programming or Linear Optimization
Histogram
Integers
Median Value