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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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拼砌四邊形
AI 訓練教室
找出對稱軸
國旗 (作圖步驟直接餵給 Claude)
兩組對邊相等和有直角的四邊形
Discover Resources
整數÷整數_ 工作紙（一）_題8
Arcs and Angles at Centre/ Circumference 弧、圓心角與圓周角
Copy of 閱讀鐘面及數字鐘（時和分）
認識角度
三个平面两两相交
Discover Topics
Linear Programming or Linear Optimization
Terms
Vectors
Congruence
Conditional Probability