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餘弦定理的圖形證明2
Author:
yuchengda
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
兩位數加法
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
直角坐標平面上的旋轉變換
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比較小數的大小
angle at centre vs angle at circumference
複利計算(1)
平行線法
比例中的定值問題(二)
Discover Topics
Straight Lines
Secant Line or Secant
Pyramid
Optimization Problems
Interest Calculation