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圓相切
Author:
一路梁
圓相切
GeoGebra
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異分母分數減法
柱體建築師
判斷球體
【案例】2013年安徽高考15题
三位數除以一位數（二）
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Quartiles and Box Plot (two data sets) 四分位數與框線圖（比較兩組數據）
斯坦納-雷米歐司(Steiner-Lehmus)定理證明二
習題二
circle
探索金字塔高度
Discover Topics
Differential Equation
Pie Chart or Circle Chart
Expected Value
Calculus
Statistics