semiperimeterSemiperimeter2007-04-22 23:35:432007-10-20 04:26:00Definition\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{psfrag}
\usepackage{graphicx}
\usepackage{amsthm}
\usepackage{xypic}
The \emph{semiperimeter} of a polygon is half of its \PMlinkname{perimeter}{Perimeter2}.
Semiperimeters are most commonly used for determining the area of a triangle. The most famous example of this usage is Heron's formula. There is also a \PMlinkescapetext{formula} for the area of a quadrilateral which involves semiperimeter.