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九九乘法表的認識
Author:
鍾文欽
GeoGebra
New Resources
畫出對稱圖形
美國國旗 (Codex 版)
找出對稱軸
近似值：有效數字
兩組對邊相等的四邊形
Discover Resources
周界
ppppp
Angle in alt.segment
閱讀鐘面及數字鐘（時和分）的副本
橢圓2-四圓心近似法
Discover Topics
Standard Deviation
Curve Sketching
Pythagoras or Pythagorean Theorem
Translation
Exponential Functions