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Reference Angle 參考角
Author:
Alex CHIK
Topic:
Trigonometry
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
四邉形 (四年級) 教師版
找出對稱軸
錐體建築師
三位數除以一位數（一）
柱體建築師
Discover Resources
圓錐曲線
JavaScript to Create Slider
三角柱展開
四次多項式的切線
幾何作圖動畫示範的副本
Discover Topics
Secant Line or Secant
Linear Programming or Linear Optimization
Set Theory
Symmetry
Conic Sections