\documentclass{article}
\usepackage{pictexwd}
\begin{document}
\beginpicture
\setcoordinatesystem units <1in, 1in>
\setplotarea x from 0 to 2, y from 0 to 3
point(a){0,0}
point(b){a, polar(5, 10 deg)}
point(c){a, polar(3, 50 deg)}
drawPoint(abc)
drawTriangle(abc)
drawIncircle(abc)
\endpicture
\end{document}