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五圆定理
Author:
Sylvie
GeoGebra
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龙形曲线-分形龙
龙形曲线-分形龙2
折扣
活动三：应用性质
第三周作业效果演示
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Clock24hour
畢氏定理動態證明(歐基里得，平形四邊形等面積2，應用時間參數跳躍函數配合向量)
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
Circle Rule
ggb 優良作品_10
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Ellipse
Statistics
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Histogram
Piecewise Functions