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fchengang
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符成岗
GeoGebra
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圓的切線方程
正方形雪花图案
第八周作业3
第八周作业2
直線的斜率：水平變化 & 鉛垂變化
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平行四邊形之變奏I
F.1 Ch10.5 Transformation of Points on the Coordinate Plane
Kumamon
圓周_心算題01
跳棋棋盘
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Cone
Plane Figures or Shapes
Prism
Logarithmic Functions
Arithmetic