Question 820809
{{{drawing(400,200000/683,-.5,2.232,-.5,1.5,
locate(sqrt(3)/2,0,x+3),locate(1.75,.5,x),
locate(.3,.15,"30°"),red(arc(0,0,1,-1,0,30)),
triangle(0,0,sqrt(3),0,sqrt(3),1) )}}}{{{matrix(13,1,

tan("30°")=x/(x+3),"",
(x+3)tan("30°")=x,"",
x*tan("30°")+3tan("30°")=x,"",
x*tan("30°")-x=-3tan("30°"),"",
x(tan("30°")-1)=-3tan("30°"),"",
x=(-3tan("30°"))/(tan("30°")-1),"",
x=4.098076211cm) }}}
<pre>
Edwin</pre>