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Author:
iedc
GeoGebra
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畫出對稱圖形
拼砌四邊形
球體建築師
四邊形的特性
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二項分佈
兩個圓的中點軌跡
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
時鐘問題
(005)80201辛宇婕
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Optimization Problems
Trapezoid
Parallelogram
Definite Integral
Arithmetic