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探究余弦定理
Author:
john arnold
请大家拖动B点,观察当角ACB发生变化时,面积的大小关系是如何变化的
GeoGebra
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球體建築師
拼砌四邊形
畫出對稱圖形
球体的体积推导
四邉形 (四年級) 教師版
Discover Resources
優良作品4(薇如)
Introduce Tangent Ratio
國徽
滑轮组2
初中数学教材配套资源【人教】
Discover Topics
Addition
Statistical Characteristics
Sphere
Parallelogram
Prism