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GeoGebra
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柱體建築師
兩組對邊相等的四邊形
找出對稱軸
第八周作业
四邊形的特性
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類正五邊形摺法
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5,求 ad - bc 最大值?
共軛點
正方形與長方形
直角三角形的內心與相似
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Kite
Vectors
Continuity
Differential Calculus
Parametric Curves