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五角星形2
Author:
vic
GeoGebra
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找出對稱軸
球體建築師
拼砌四邊形
兩位數除以一位數（二）
兩位數除以一位數（一）
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題6
第一冊
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
翰林卷第10题
S3 Ex4.3 Q06(3D圖)
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Vectors 3D (Three-Dimensional)
Unit Circle
Tangent Function
Difference and Slope
Equations