perimeter The perimeter of a plane figure is the length of its boundary. Thus, the perimeter of a rectangle of length L and width W is 2L + 2W. The perimeter of a circle is the arc length of its circumference. See isoperimetric inequality.
perimeter
数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。