22 Aug 2007

## Asymptote using geometry.asy – fig0730

 (Compiled with Asymptote version 2.14svn-r5318)
```
import geometry;
unitsize(2cm);

// currentcoordsys=cartesiansystem((0,0),i=(1,0.5),j=(-0.5,.75));
show(currentcoordsys, xpen=invisible);

point A=(-2,2);
dot("\$A\$",A,S);
point B=A+(cos(0.5),cos(1));
dot("\$B\$",B,S);

circle c=circle(A,2);
draw(c);

line l=line(A,B);
draw(l);
point M=intersectionpoints(l,c)[0];
point P=intersectionpoints(l,c)[1];

/* View the definition of void dot(picture,Label,explicit point,align,string,pen) */
dot("",M,2E,linewidth(2mm));
dot("\$M\$",M,2W);
dot("",P,2E,linewidth(2mm));
dot("\$P\$",P,2W);

pair p=A-(4,2.5);
transform t=shift((0,-0.3));
transform T=shift((4,0));
real x;

/* View the definition of abscissa angabscissa(circle,point) */
x=angabscissa(c,M).x;
label("angabscissa(c,M).x=\$"+(string)x+"^\circ\$",p,E);
dot(angpoint(c,x),1mm+red);
x=angabscissa(c,P).x;
label("angabscissa(c,P).x=\$"+(string)x+"^\circ\$",T*p,E);
dot(angpoint(c,x),1mm+red);

p=t*p;
/* View the definition of abscissa curabscissa(circle,point) */
x=curabscissa(c,M).x;
dot(curpoint(c,x),1mm+red);
label("curabscissa(c,M).x="+(string)x,p,E);
x=curabscissa(c,P).x;
label("curabscissa(c,P).x="+(string)x,T*p,E);
dot(curpoint(c,x),1mm+red);

p=t*p;
/* View the definition of abscissa nodabscissa(circle,point) */
x=nodabscissa(c,M).x;
label("nodabscissa(c,M).x="+(string)x,p,E);
dot(point(c,x),1mm+red);
x=nodabscissa(c,P).x;
label("nodabscissa(c,P).x="+(string)x,T*p,E);
dot(point(c,x),1mm+red);

p=t*p;
/* View the definition of abscissa relabscissa(circle,point) */
x=relabscissa(c,M).x;
label("relabscissa(c,M).x="+(string)x,p,E);
dot(relpoint(c,x),1mm+red);
x=relabscissa(c,P).x;
label("relabscissa(c,P).x="+(string)x,T*p,E);
dot(relpoint(c,x),1mm+red);

```

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