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三角形的外心
Author:
arist
GeoGebra
New Resources
画直线等分三角形的面积
兩位數除以一位數（一）
異分母分數減法
算柱 (兩位數)
畫出對稱圖形
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科學記號與小數點的位移
旋轉一物件02
Introduce tangent ratio
Scatter diagram(散點圖)
平面幾何的思考
Discover Topics
Circle
Stochastic Process or Random Process
Step Functions
Square
Angles