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几何瑰宝-勾股定理的扩展
Author:
Sylvie
GeoGebra
New Resources
三位數除以一位數（一）
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
柱體建築師
找出對稱軸
Discover Resources
路徑二動畫
西瓦定理 (Ceva's Theorem)
Properties of a Square
Copy of 銳角三角：sin, cos
容量(閱讀不同刻度的量杯)
Discover Topics
Polygons
Cosine
Continuity
Similarity Transformation or Similarity
Similar Triangles