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正十二面體內接正四面體或內接正六面體
Author:
侯杰材
GeoGebra
New Resources
四邉形 (四年級) 教師版
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
異分母分數減法
找出對稱軸
Discover Resources
正n邊形的組合
Congruent and Similarity
图中的三角形面积何时最小?(许兴华数学)
小正多边形在大正多边形内的滚动(边长不相等)
斐波那契螺旋弧线(表格法)
Discover Topics
Curve Sketching
Similar Triangles
Quadratic Equations
Power Functions
Orthocenter