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Theorem 2: Ext. angle, cyclic quad
作者：
Hlho
Instructions
Drag the points in the figure and observe the external angles.
GeoGebra
最新資源
Position Vector and Derivative Vector
bewijs stelling van Pythagoras
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探索資源
Tangent Train: ln(x)
Stereographic projection 2
速率－行程問題1
Caesar (Shift) Cipher
探索主題
周長
一般四邊形
直角三角形
正切線或正切
統計特徵