Definition:Incircle of Triangle

Incircle
The incircle of a triangle is the circle tangent to each side of the triangle. This circle is said to be inscribed in the triangle.



In the above, $$r$$ is the inradius.

Incenter
The center of an incircle is called an incenter.

Inradius
The radius of an incircle is called an inradius.

Compare To
Compare incircles to circumcircles and excircles.