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Angle of elevation and Angle of depression(仰角和俯角)
Author:
chisunch1
GeoGebra
New Resources
柱體建築師
画直线等分三角形的面积
四邊形的特性
找出對稱軸
三位數除以一位數（一）
Discover Resources
來畫雙曲線
星形工具(1060724)
Copy of 線性組合2 三角形
圓周 (圖形F) 的複本
三角形的垂心（一）
Discover Topics
Straight Lines
Arithmetic
Pythagoras or Pythagorean Theorem
Angles
Complex Numbers