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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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圓周公式的應用
【案例】2018年全国1卷理科12题
漂亮的摇摆曲线
直線的斜率
垂直線的斜率
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相似三角形
动圆在定圆上滚动
参数曲线
除法Q3
加法001(结果10以内)
Discover Topics
Equations
Line Segment
Arithmetic Operations
Constructions
Polygons