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切割正八面體
Author:
薛鈞聰
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
直角坐標平面上的旋轉變換
第八周作业
畫出對稱圖形
Discover Resources
轉移矩陣 (馬可夫鏈)
ABC 2
比較角的大小 一
直线运动
Copy of Triangular Number
Discover Topics
Geometry
Integers
Multiplication
Right Triangles
Pythagoras or Pythagorean Theorem