%* -------------------------------------------
%* mathsPIC 2.1
%* Copyright (c) RWD Nickalls 1999-2000
%* Email: dicknickalls@compuserve.com
%* Date (m/d/y) : 11-05-2000  21:06:54
%* Command Line: /b/s  MPICM10.M
%* Input Filename:  MPICM10.M
%* Output Filename: MPICM10.MT
%* -------------------------------------------
%% mPICm10.m (figure 10)
%% mathsPIC    circle with arrows
%%-------------------
%\documentclass[a4paper]{article}
%\usepackage{pictexwd}
%\begin{document}
%%---------------------
\beginpicture
%% paper{units(mm),xrange(5,55),yrange(5,55)}  
\setcoordinatesystem units < 1mm, 1mm>
\setplotarea x from  5 to  55, y from  5 to  55
%% point(C){30,30}[$\odot$,1.2]  ( 30 , 30 )  %% center
%% variable(r){20}  ( 20 )  %% radius
%% drawcircle(C,r)    
\circulararc 360 degrees from  50  30 center at  30  30
%% point(P){C,polar(r,250deg)}  ( 23.1596 , 11.20615 )  
%% point(Q){C,polar(r,120deg)}  ( 20 , 47.32051 )  
%% point(S){C,polar(r,-30deg)}  ( 47.32051 , 20 )  
%% drawpoints(CPQS)  
\put {$\odot$} at  30  30  %% C
\put {$\bullet$} at  23.1596  11.20615  %% P
\put {$\bullet$} at  20  47.32051  %% Q
\put {$\bullet$} at  47.32051  20  %% S
%% drawlines(PCSQP)  
\plot   23.1596  11.20615     29.58958  28.87237 /  %% PC
\plot   31.03923  29.4     47.32051  20 /  %% CS
\plot   47.32051  20     20  47.32051 /  %% SQ
\plot   20  47.32051     23.1596  11.20615 /  %% QP
%% text($P$){P,polar(5,250deg)}  
\put {$P$} at  21.4495  6.507683
%% text($Q$){Q,polar(5,120deg)}  
\put {$Q$} at  17.5  51.65063
%% text($S$){S,polar(5,-30deg)}  
\put {$S$} at  51.65063  17.5
%% drawAngleArrow{angle(PCS),radius(8)anticlockwiseinternal}  
\circulararc  79.99999 degrees from  27.26384  22.48246 center at  30  30
\arrow <1.5mm>  [0.5, 1] from   36.37505   25.16692 to  36.9282  26
%% text($\beta$){C,polar(5,285deg)}  
\put {$\beta$} at  31.29409  25.17037
%% drawAngleArrow{angle(PQS),radius(12)anticlockwiseinternal}  
\circulararc  40 degrees from  21.04587  35.36617 center at  20  47.32051
\arrow <1.5mm>  [0.5, 1] from   27.74932   38.1582 to  28.48528  38.83522
%% text($\alpha$){Q,polar(8,-65deg)}  
\put {$\alpha$} at  23.38095  40.07005
%% showangle(PQS)  % alpha  40 degrees  /  radians .6981316 
%% showangle(PCS)  % beta  79.99999 degrees  /  radians 1.396263 
\endpicture
%%-------------------
%\end{document}