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勾股定理证明
Author:
DJH
Topic:
Pythagoras or Pythagorean Theorem
GeoGebra
New Resources
兩位數除以一位數（二）
第八周作业
兩位數加法
錐體建築師
找出對稱軸
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我的作法
Trisectin the cube into 3 pyramids
相同圖形的拼砌（三角形）
比較角的大小
三角形的三心
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Complex Numbers
Fractions
Circle
Quadratic Functions
Symmetry