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解三角形（１）
Author:
蔡永志
Topic:
Triangles
,
Trigonometry
解三角形
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
四邊形的特性
畫出對稱圖形
算柱 (兩位數)
Discover Resources
S2 ch2.3 simultaneous equation
Copy of 教學－與直線有關的角
等腰三角形
Cross Product for 2D Vectors (平面外積)
圆周展开
Discover Topics
Combinatorics
Mode
Calculus
Limits
Pyramid