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平行四边形变形
Author:
dhc987
GeoGebra
New Resources
柱體建築師
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
四邉形 (四年級) 教師版
四邊形的特性
Discover Resources
waaachen
Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
轨迹最值问题
黄金三角形到螺旋线（表格法）
元旦快乐（制作：孟宝兴）
Discover Topics
Statistical Characteristics
Derivative
Parabola
Numbers
Right Triangles