Question

define circumcircle of a triangle​

Answer 1

Answer:

Sure.

Step-by-step explanation:

Circumcircle of a triangle is the circle that touches all the vertices of a triangle.

Not only triangle; any circle is a circumcircle if it touches the vertices of a polygon.

Answer 2

Answer:

The circumcircle is a triangle's circumscribed circle, i.e., the unique circle that passes through each of the triangle's three vertices. The center of the circumcircle is called the circumcenter, and the circle's radius is called the circumradius.