The inner Vecten circle is the circumcircle of the inner Vecten triangle. It has center at Kimberling center 
, which is the complement
of the inner Vecten point 
and has triangle center function
 |
where 
is the area of the reference triangle, and
its radius is a slightly complicated expression. Its circle
function is
![l=-4a^3Delta[Delta-2bccos(B-C)].](/images/equations/InnerVectenCircle/NumberedEquation2.svg) |
No Kimberling centers lie on the circle.
