金字塔的內切球半徑
將金字塔切成四個全等的正三角錐與一個正立方錐，利用體積和，可求內切球半徑。
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