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Author:
yen
GeoGebra
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平行線的判定
常见四边形是否是双心四边形
活动三：应用性质
第八周作业2
龙形曲线-分形龙
Discover Resources
量度活動所用的時間 (時、分)
testtesttesttesttest
磁磚著色
假的龍珠
Copy of 倒數計時
Discover Topics
Definite Integral
Orthocenter
Parametric Curves
Translation
Pythagoras or Pythagorean Theorem