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時鐘問題
Author:
連琨銘
GeoGebra
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拼砌四邊形
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數加法
GeoGebra笔记功能体验课件
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[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
一元二次方程求根公式
複合圖形(二)
Cube
拋物線四-平行四邊形法
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Cylinder
Curve Sketching
Special Points
Numbers
Circle