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三角函數sine跟cosine
Author:
JUNWAYLIANG
GeoGebra
New Resources
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
異分母分數減法
球體建築師
GeoGebra笔记功能体验课件
Discover Resources
正n凸多邊形旋轉對稱／反射對稱
尋找三角形的內切圓
題11
St. Line
正方形纸片剪出正三角形（顶点在边上）
Discover Topics
Right Triangles
Similarity Transformation or Similarity
Tangent Function
Solids or 3D Shapes
Area