Medical Definition of Snellen chart. : the chart used in the snellen test with black letters of various sizes against a white background.
The circumcenter, the incenter is the point of concurrency of the angle bisectors of a triangle.
Descartes' and Hessian Foliums. When triangle ABC is scalene, intersection point P is an exterior point, and when ABC is isosceles or equilateral, the angle bisector, AD, and the perpendicular bisector of BC are concurrent. Let I be the incenter of the hyperbolic triangle ABC, and let the angle bisectors be AD, BE, and CF.