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Author:
肖昆明
GeoGebra
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兩組對邊相等和有直角的四邊形
異分母分數減法
【案例】2013年安徽高考15题
兩位數除以一位數(二)
兩位數除以一位數(一)
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找中點的坐標
線性代數
Circle
閱讀月曆(綜合版)
两角和的正切公式几何证明
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Diagrams
Linear Functions
Continuity
Linear Programming or Linear Optimization
Angles