Question

A short note about circumcircle

Answer 1

The circumcircle of a polygon is defined: the circle that passes through every vertex. ... The circumcircle of a triangle is the circle that passes through all three vertices of the triangle. It's center is called thecircumcenter, which is the point where the three perpedicular bisectors of the sides intersect.

Answer 2

Circumcircle is the overall  length boundary  of circle