三角測量
由建築物正南方一點S與正西方一點W觀察建築物屋頂的仰角。測得WS的距離，計算建築物的高度。
This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
藍邦偉 老師, 製作軟體：
GeoGebra