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.
The incenter of a triangle is the point where the three angle bisectors meet. This point is the same distance from each of the three sides of the triangle. An inscribed angle is an angle whose vertex is on a circle and whose rays intersect the circle. An intercept is an intersection of a graph with one of the axes.