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圓的內接四邊形
Author:
曾己泉
用滑鼠移動圓形的點觀察角度的變化與角度和
GeoGebra
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GeoGebra笔记功能体验课件
找出對稱軸
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邊形的特性
Discover Resources
閱讀鐘面及數字鐘（時和分）
TRY_4.11.2016
角平分線
test07
三角五形
Discover Topics
Tangent Line or Tangent
Right Triangles
Integral Calculus
Confidence Interval
Real Numbers