求正四面體的內接球半徑
運用四個小的正三角錐的體積和等於正四面體的體積
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