Definition:Circumcircle of Triangle

Circumcircle
The circumcircle of a triangle is the circle that passes through all three of the triangle's vertices. This circle is said to circumscribe the triangle.



In the above diagram, $$R$$ is the circumradius.

Circumcenter
The center of an circumcircle is called a circumcenter.

Circumradius
The radius of an circumcircle is called a circumradius.

Compare To
Compare circumcircles to incircles and excircles.