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任务9：外凸的正方形
Author:
陈丽婷
GeoGebra
New Resources
百分數及其應用
科氏力 (Coriolis Force)
撒针估算面积实验
平行線的判定
科赫雪花
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圓周角
重複排列
congruent (SSS) 2
圆锥曲线的第二定义
指数函数的副本
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Congruence
Cone
Distributions
Statistics
Power Functions