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任意四边形各边中点的连线必构成平行四边形.许兴华数学
Author:
许兴华数学
Topic:
General Quadrilateral
GeoGebra
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判斷球體
第八周作业
兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩位數除以一位數(二)
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直線排列 3
繡曲線
谢庆GGB绘本一
高考真题椭圆
平面截距式的副本
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Incircle or Inscribed Circle
Area
Poisson Distribution
Trapezoid
Mode