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正弦公式證明 (Mr. KONG)
Author:
timkong
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
判斷球體
兩位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
點的堆墮
外擺線
圓冪性質
圆周展开
动点最值问题&抛物线模型
Discover Topics
Parametric Curves
Indefinite Integral
Piecewise Functions
Diagrams
Isosceles Triangles