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三角形外心的角度關係
Author:
均一
GeoGebra
New Resources
判斷球體
錐體建築師
第八周作业
兩組對邊相等的四邊形
算柱 (兩位數)
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對角線
圓錐的截面
曲柄搖桿接雙搖桿
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5,求 ad - bc 最大值?
高次不等式
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Straight Lines
Terms
Geometric Mean
Kite
Subtraction