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平行四邊形
Author:
eyun306
Topic:
Parallelogram
GeoGebra
New Resources
找出對稱軸
拼砌四邊形
球体的体积推导(优化版)
兩組對邊相等的四邊形
兩位數加法
Discover Resources
固定周界的長方形的面積變化
五上_分數乘法(教師版)
Apollonius Problem gergonne
ghseh 二次函數動畫左右平移
AMC
Discover Topics
Quadrilaterals
Addition
Upper and Lower Sum or Riemann Sum
Right Triangles
Real Numbers