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Quiz on Solving Right Triangles (Finding Angles) 解直角三角形：測驗2（求角度）
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.gmath.hk
New Resources
画直线等分三角形的面积
兩位數除以一位數（一）
算柱 (兩位數)
球體建築師
GeoGebra笔记功能体验课件
Discover Resources
Light Game
空間向量
Salaries Tax (F.3)
圓周 (圖形C) 的複本
异形操场
Discover Topics
Ratios
Hyperbola
Standard Deviation
Translation
Secant Line or Secant