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多边形内角
Author:
sschy
GeoGebra
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活动三：应用性质
异形操场
斐波那契螺旋弧线（表格法-可动态调节）
科氏力 (Coriolis Force)
常见四边形是否是双心四边形
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了解為何 d(lnx)/dx = 1/x
坐標幾何
proof30黃煒皓
習題1.1 (P16) _ 2016.10.02
How tall is that?
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Percentages
Parabola
Geometric Distribution
Upper and Lower Sum or Riemann Sum
Square