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極座標 r=1+cos(θ)
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GEOGEBRA啟
GeoGebra
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斐波那契螺旋弧线（表格法-可动态调节）
活动三：应用性质
科赫雪花
正方形雪花图案
第八周作业1
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代數
點與直線距離、直線與直線距離
方格纸上画平行线和垂线
angles sum on a striaght line
S3 WS4.3 Q02(3D圖)
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Rhombus
Scalene Triangles
Rectangle
Upper and Lower Sum or Riemann Sum
Means