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%* -------------------------------------------
%* mathsPIC 2.1
%* Copyright (c) RWD Nickalls 1999-2000
%* Email: dicknickalls@compuserve.com
%* Date (m/d/y) : 11-05-2000  21:01:05
%* Command Line: /b/s  MPICM07.M
%* Input Filename:  MPICM07.M
%* Output Filename: MPICM07.MT
%* -------------------------------------------
%% mPICm07.m (Figure 7)
%% mathsPIC   arrow in triangle
%\documentclass[a4paper]{article}
%\usepackage{pictexwd}
%\begin{document}
%%-------------------
\beginpicture
%% paper{units(mm),xrange(5,45),yrange(5,45)}  
\setcoordinatesystem units < 1mm, 1mm>
\setplotarea x from  5 to  45, y from  5 to  45
%% point(A){30,30}  ( 30 , 30 )  
%% point(P){10,10}  ( 10 , 10 )  
%% point(B){30,10}  ( 30 , 10 )  
%% drawPoints(APB)  
\put {$\bullet$} at  30  30  %% A
\put {$\bullet$} at  10  10  %% P
\put {$\bullet$} at  30  10  %% B
%% drawLine(APBA)  
\plot   30  30     10  10 /  %% AP
\putrule from   10  10 to  30  10  %% PB
\putrule from   30  10 to  30  30  %% BA
%% text($A$){A,shift(1,5)}  
\put {$A$} at  31  35
%% text($B$){B,shift(5,0)}  
\put {$B$} at  35  10
%% text($P$){P,shift(-5,0)}  
\put {$P$} at  5  10
%% drawAngleArrow{angle(BPA),radius(11),anticlockwise,internal}  
\circulararc  45.00001 degrees from  21  10 center at  10  10
\arrow <1.5mm>  [0.5, 1] from   18.45241   17.03966 to  17.77818  17.77818
%% text($\psi$){P,polar(7,22.5deg)}  
\put {$\psi$} at  16.46716  12.67878
%% drawRightangle(ABP,2.5)  
\plot   27.5  10     27.5  12.5   /
\plot   30  12.5     27.5  12.5   /
\endpicture
%%------------------
%\end{document}