The distance around a two-dimensional shape.
Example: the perimeter of this rectangle is 3+7+3+7 = 20
The perimeter of a circle is called the circumference.
数学辞典收录了1200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。