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冲关选18
Author:
黄旭
GeoGebra
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四邊形的特性
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
判斷球體
兩位數除以一位數（二）
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棋盤的 L 形覆蓋
圓形,三角形軌跡觀察
Apollonius Problem 10 CCC wiki step 4
GGB5
邊長與三角形
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Linear Functions
Area
Vectors
Scatter Plot
Geometric Distribution