摘要
托勒密定理指圆内接凸四边形两组对边乘积的和等于两对角线的乘积。托勒密定理主要用于圆内线段的计算和证明,解决正多边形的一些尺规作图问题。
This paper presents a new method to demonstrate Ptolemy theorem with complex number and gives examples about the application of Ptolemy theorem. For instance, calculating and demonstrating about the length of line segments in a circle and solving problems concerning drawing regular polygon with ruler and compass.
出处
《天水师范学院学报》
2004年第2期11-13,共3页
Journal of Tianshui Normal University
关键词
托勒密定理
圆
凸四边形
证明方法
复数
Ptolemy theorem
demonstration of complex number
application