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hjzx1
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GeoGebra
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中华人民共和国国旗
平行線的判定
活动三：应用性质
圓的基本性質
百分數及其應用
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task 2
BkD_act15_04c
平面幾何的思考
基華小學 GeoGebra 幾何創作室 第 3 節
勒洛四面体（参数曲面法）
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Parametric Curves
Upper and Lower Sum or Riemann Sum
Scalene Triangles
Surface
Quadrilaterals