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應用圓周公式：題 2
Author:
肖昆明
GeoGebra
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异形操场
双心四边形
常见四边形是否是双心四边形
活动三：应用性质
科氏力 (Coriolis Force)
Discover Resources
排列
題4
用 Geogebra 模擬日照、影長變換
橢圓3-平行四邊形法
旋转的圆锥内接锥体.许兴华数学
Discover Topics
Tangent Function
Trigonometric Functions
Line Segment
Translation
Differential Calculus